10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2017

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 001-36570

ZOSANO PHARMA CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	45-4488360
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

34790 Ardentech Court

Fremont, CA 94555

(Address of principal executive offices) (Zip Code)

(510) 745-1200

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☐  (Do not check if a smaller reporting company)	Smaller reporting company	☒
Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of November 3, 2017, the registrant had a total of 39,460,931 shares of its common stock, $0.0001 par value per share, outstanding.

Zosano Pharma Corporation

Quarterly Report on Form 10-Q

INDEX

		Page
PART I. FINANCIAL INFORMATION		3
Item 1.	Financial Statements	3
	Condensed Consolidated Balance Sheets	3
	Condensed Consolidated Statements of Operations and Comprehensive Loss	4
	Condensed Consolidated Statements of Cash Flows	5
	Notes to Condensed Consolidated Financial Statements	6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	22
Item 4.	Controls and Procedures	22
PART II. OTHER INFORMATION		23
Item 1.	Legal Proceedings	23
Item 1A	Risk Factors	23
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	23
Item 3.	Defaults Upon Senior Securities	23
Item 4.	Mine Safety Disclosures	23
Item 5.	Other Information	23
Item 6.	Exhibits	23
SIGNATURES		24

2

PART I.     FINANCIAL INFORMATION

Item 1.    Financial Statements

ZOSANO PHARMA CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value and share amounts)

	September 30,		December 31,
	2017		2016
	(unaudited)
A S S E T S
Current assets:
Cash and cash equivalents	$	13,292	$	15,003
Short-term investments in marketable securities		6,557		-
Prepaid expenses and other current assets		1,335		273
Total current assets		21,184		15,276
Restricted cash		35		35
Property and equipment, net		4,240		5,455
Other long-term assets		420		140
Total assets	$	25,879	$	20,906
L I A B I L I T I E S  A N D  S T O C K H O L D E R S’  E Q U I T Y
Current liabilities:
Accounts payable	$	1,074	$	1,445
Accrued compensation		1,304		1,377
Secured promissory note (including accrued interest), net of issuance costs, current portion		6,229		5,992
Other accrued liabilities		768		1,005
Total current liabilities		9,375		9,819
Deferred rent		323		52
Secured promissory note (including accrued interest), net of issuance costs		1,948		6,550
Total liabilities		11,646		16,421
Commitments and contingencies (note 7)
Stockholders’ equity:
Common stock, $0.0001 par value; 100,000,000 shares authorized as of September 30, 2017 and December 31, 2016; 39,233,431 and 16,815,997 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively		4		2
Additional paid-in capital		232,614		201,252
Accumulated deficit		(218,385)		(196,769)
Stockholders’ equity		14,233		4,485
Total liabilities and stockholders’ equity	$	25,879	$	20,906

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

ZOSANO PHARMA CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited; in thousands, except per share amounts)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Revenue	$	-	$	-	$	-	$	-
Operating expenses:
Research and development		5,683		5,124		14,672		15,044
General and administrative		2,036		2,010		6,346		6,137
Total operating expenses		7,719		7,134		21,018		21,181
Loss from operations		(7,719)		(7,134)		(21,018)		(21,181)
Other income (expense):
Interest expense, net		(154)		(314)		(608)		(951)
Other income, net		-		-		10		49
Loss before provision for income taxes		(7,873)		(7,448)		(21,616)		(22,083)
Provision for income taxes		-		-		-		-
Net loss		(7,873)		(7,448)		(21,616)		(22,083)
Other comprehensive gain (loss):
Unrealized gain (loss) on marketable securities, net of tax effect		2		(3)		-		(1)
Comprehensive loss	$	(7,871)	$	(7,451)	$	(21,616)	$	(22,084)
Net loss per common share – basic and diluted	$	(0.20)	$	(0.52)	$	(0.66)	$	(1.73)
Weighted-average shares used in computing net loss per common share – basic and diluted		39,228		14,259		32,991		12,752

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

ZOSANO PHARMA CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited; in thousands)

	Nine Months Ended September 30,
	2017		2016
Cash flows from operating activities:
Net loss	$	(21,616)	$	(22,083)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		1,902		1,866
Stock-based compensation		562		896
Gain on sale of equipment		(13)		(51)
Accretion of interest		44		241
Deferred rent		271		6
Change in operating assets and liabilities:
Prepaid expenses and other assets		(1,325)		(103)
Accounts payable		(370)		484
Accrued compensation and other accrued liabilities		(410)		(60)
Net cash used in operating activities		(20,955)		(18,804)
Cash flows from investing activities:
Purchase of property and equipment		(709)		(325)
Proceeds from sales of property and equipment		22		63
Purchase of marketable securities		(8,280)		-
Proceeds from maturities of investments in marketable securities		1,720		26,332
Increase in other investment		-		(18)
Net cash provided by (used in) investing activities		(7,247)		26,052
Cash flows from financing activities:
Proceeds from public offering of securities, net of underwriting commissions, discounts and other offering costs		26,623		-
Proceeds from exercise of warrants and issuance of common stock		4,041		-
Proceeds from issuance of securities in private investment in public equity (PIPE), net		-		6,642
Payment of loan principal		(4,310)		(1,364)
Proceeds from exercise of stock options and issuance of common stock		137		6
Net cash provided by financing activities		26,491		5,284
Net increase (decrease) in cash and cash equivalents		(1,711)		12,532
Cash and cash equivalents at beginning of period		15,003		6,646
Cash and cash equivalents at end of period	$	13,292	$	19,178
Supplemental cash flow information:
Interest paid	$	718	$	902
Non-cash investing activities:
Acquisition of property and equipment under accounts payable	$	45	$	-

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

Zosano Pharma Corporation and Subsidiary

Notes to Condensed Consolidated Financial Statements

September 30, 2017

(unaudited)

1. Organization

The Company

 Zosano Pharma Corporation (“the Company”) is a clinical stage biopharmaceutical company focused on providing rapid systemic administration of therapeutics to patients using its proprietary Adhesive Dermally-Applied Microarray (“ADAM”) technology. In February 2017, the Company announced positive results from its ZOTRIP pivotal efficacy trial that evaluated M207, which is the Company’s proprietary formulation of zolmitriptan delivered via its ADAM technology, as an acute treatment for migraine. Zosano is focused on developing products where rapid administration of established molecules with known safety and efficacy profiles provides an increased benefit to patients, for markets where patients remain underserved by existing therapies. The Company anticipates that many of its current and future development programs may enable the Company to utilize a regulatory pathway that would streamline clinical development and accelerate the path towards commercialization.

As of September 30, 2017, Zosano Pharma Corporation has one wholly owned subsidiary, ZP Opco, Inc. (“Opco”), through which the Company conducts its primary research and development activities.

2. Summary of Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, the instructions to Form 10-Q and Regulation S-X. They do not include all the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2017, are not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or any other subsequent period. These financial statements should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2016, included in the Company’s annual report on Form 10-K filed with the U.S. Securities and Exchange Commission (“SEC”).

Use of Estimates

The preparation of the accompanying condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the periods reported. Actual results could differ from those estimates.

Liquidity and Substantial Doubt in Going Concern

 The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. GAAP, which contemplate continuation of the Company as a going concern. As of September 30, 2017, the Company has an accumulated deficit of $218.4 million, as well as recurring operating losses and negative cash flows from operating activities. Presently, the Company does not have sufficient cash resources to meet its plans in the next twelve months from issuance of this report.

The Company has financed its operations primarily through the sale of equity securities, debt financing and payments received under its former licensing and collaboration agreements with pharmaceutical companies. To date, none of the Company’s product candidates have been approved by the United States Food and Drug Administration for sale. The Company will continue to require additional financing to develop its product candidates and fund operating losses. Management intends to seek capital to support the Company’s initiatives through equity or debt financing, collaboration or other arrangements with corporate partners, and/or other sources of financing. However, if such financing is not available at adequate levels or on acceptable terms, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of or eliminate some of its development programs, out-license intellectual property rights, or a combination of the above, which may have a material adverse effect on the Company’s business, results of operations, financial condition and/or its ability to meet its scheduled obligations on a timely basis, if at all. Although management has been successful in raising capital in the past, there can be no assurance that the Company will be successful, or that any needed financing will be available in the future at terms acceptable to the Company. In October 2017, the Company entered into a stock purchase agreement with an accredited investor pursuant to which the Company can raise additional capital, subject to certain limitations and restrictions. However, even if the Company receives proceeds under this agreement, the Company will continue to require additional financing. See Note 10 for additional information on the October 2017 stock purchase agreement.

6

These factors raise substantial doubt regarding the Company’s ability to continue as a going concern within one year after the issuance of this report. There are no assurances that such additional funding will be achieved and that the Company will succeed in its future operations. The Company’s inability to obtain required funding in the near future or its inability to obtain funding on favorable terms will have a material adverse effect on its operations and strategic development plan for future growth. If the Company cannot successfully raise additional capital and implement its strategic development plan, its liquidity, financial condition and business prospects will be materially and adversely affected, and the Company may have to cease operations.

Consolidation

The condensed consolidated financial statements include the accounts of Zosano Pharma Corporation and Opco. Intercompany balances and transactions have been eliminated in consolidation.

Significant Accounting Policies

There have been no material changes to the Company’s significant accounting policies during the nine months ended September 30, 2017, as compared to the significant accounting policies described in Note 2 of the “Notes to Consolidated Financial Statements” in the Company’ s Annual Report on Form 10-K for the year ended December 31, 2016.

Research and Development Expenses

Research and development costs are charged to expense as incurred and consist of costs related to (i) furthering the Company’s research and development efforts, and (ii) designing and manufacturing products that incorporate the Company’s ADAM technology for the Company’s clinical and nonclinical studies.

Net Loss Per Common Share

Basic net income (loss) per common share is calculated by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive common stock equivalents. Diluted net income (loss) per common share is computed by giving effect to all potentially dilutive common stock equivalents outstanding for the period. For purposes of this calculation, warrants and options to purchase common stock are considered potentially dilutive common stock equivalents. For the three and nine months ended September 30, 2017 and 2016, diluted net loss per common share was the same as basic net loss per common share since the effect of inclusion of potentially dilutive common stock equivalents would have an antidilutive effect due to the loss reported.

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive (unaudited; shares in thousands):

	September 30,
	2017		2016
Warrants to purchase common stock		3,991		9,672
Options to purchase common stock		2,195		1,373
		6,186		11,045

 Recent Accounting Pronouncements

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Compensation – Stock Compensation; Scope of Modification Accounting. This ASU provides guidance on which changes to the terms and conditions of a share-based payment award constitute a modification. This amendment is effective for all entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

7

In February 2017, the FASB issued ASU 2017-05, Other Income Gain and Losses from the Derecognition of Nonfinancial Assets. Under ASU 2017-05, all entities are required to derecognize or deconsolidate a business or nonprofit activity in accordance with Topic 810. The amendments in this update also simplify U.S. GAAP by eliminating several accounting differences between transactions involving assets and transactions involving businesses. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows. This ASU provides guidance on the presentation of cash, cash equivalents and restricted cash in the statement of cash flows to reduce the current diversity in practice. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. Under the new guidance, lessees will be required to recognize substantially all leases on the balance sheet as a right-of-use asset and recognize a corresponding lease liability. The accounting applied by a lessor is largely unchanged from that applied under previous U.S. GAAP. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities, which amends the guidance in U.S. GAAP on the classification and measurement of financial instruments. Changes to the current guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

3. Cash, Cash Equivalents and Investments

The Company classifies all highly liquid investments with maturities of three months or less at the date of purchase as cash equivalents. The following is a summary of the Company’s cash, cash equivalents, and marketable securities investments for each of the periods presented (in thousands):

	September 30, 2017
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
	(unaudited)
Cash in bank	$	10,836	$	-	$	-	$	10,836
Money market funds		1,954		-		-		1,954
Certificates of deposit (restricted)		35		-		-		35
Certificates of deposit		3,404		-		-		3,404
Commercial paper		250		-		-		250
Corporate notes and bonds		2,006		-		-		2,006
U.S. government agency bonds		1,399		-		-		1,399
	$	19,884	$	-	$	-	$	19,884
Classified as:
Cash and cash equivalents							$	13,292
Restricted cash								35
Short-term investments in marketable securities								6,557
							$	19,884

8

	December 31, 2016
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
Cash in bank	$	3,342	$	-	$	-	$	3,342
Money market funds		11,661		-		-		11,661
Certificates of deposit (restricted)		35		-		-		35
	$	15,038	$	-	$	-	$	15,038
Classified as:
Cash and cash equivalents							$	15,003
Restricted cash								35
							$	15,038

4. Fair Value of Financial Instruments

The Company records its financial assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows:

• Level 1: Inputs which include quoted prices in active markets for identical assets and liabilities.

• Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The carrying values of certain assets and liabilities of the Company, such as cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable and accrued liabilities, approximate fair value due to their relatively short maturities. The carrying value of the Company’s short-term notes payable approximates their fair value as the terms of the borrowing are consistent with current market rates and the duration to maturity is short. The carrying value of the Company’s long-term notes payable approximates fair value because the interest rates approximate market rates that the Company could obtain for debt with similar terms and maturities.

The following tables set forth the fair value of the Company’s financial instruments for each of the periods presented (in thousands):

	September 30, 2017
	Level I		Level II		Level III		Total
	(unaudited)
Financial Assets:
Money market funds	$	1,954	$	-	$	-	$	1,954
Certificates of deposit		-		3,404		-		3,404
Commercial paper		-		250		-		250
Corporate notes and bonds		-		2,006		-		2,006
U.S. government agency bonds		-		1,399		-		1,399
Total financial assets	$	1,954	$	7,059	$	-	$	9,013

9

	December 31, 2016
	Level I		Level II		Level III		Total
Financial Assets:
Money market funds	$	11,661	$	-	$	-	$	11,661
Total financial assets	$	11,661	$	-	$	-	$	11,661

5. Property and Equipment

The following summarizes the Company’s property and equipment for each of the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Laboratory and office equipment	$	1,350	$	1,127
Manufacturing equipment		10,969		10,857
Computer equipment and software		340		314
Leasehold improvements		15,705		15,694
Construction in progress		2,182		1,961
		30,546		29,953
Less: accumulated depreciation		(26,306)		(24,498)
	$	4,240	$	5,455

Depreciation and amortization expense was approximately $0.6 million for both the three months ended September 30, 2017 and 2016. Depreciation and amortization expense was $1.9 million for the both the nine months ended September 30, 2017 and 2016.

6. Debt Financing

In June 2014, the Company entered into a loan and security agreement with Hercules Capital, Inc. (“Hercules”) which provided the Company $4.0 million in debt financing. In June 2015, the Company entered into a first amendment to the loan and security agreement with Hercules to increase the aggregate principal amount of the loan to $15.0 million (“Hercules Term Loan”). Upon the execution of the first amendment to the loan and security agreement, the Company used approximately $11.4 million of the Hercules Term Loan to prepay all amounts owing under the secured promissory note held by BMV Direct SOTRS LP, an affiliate of BioMed Realty Holdings, Inc. (“BMR Holdings”). BMV Direct SOTRS LP owns more than 5% of the Company’s common stock and therefore is a beneficial owner of the Company.

The Hercules Term Loan provides that the $15.0 million principal balance will be subject to a 12-month interest-only period beginning July 1, 2015, followed by equal monthly installment payments of principal and interest, with all outstanding amounts due and payable on December 1, 2018. The outstanding principal balance bears interest at a variable rate of the greater of (i) 7.95%, or (ii) 7.95% plus the prime rate as quoted in the Wall Street Journal minus 5.25%. The interest rate on the Hercules Term Loan was 7.95% as of September 30, 2017, and December 31, 2016. On June 1, 2017, the Company paid a $100,000 legacy end of term charge and will pay an additional $351,135 end of term charge on the earlier of loan maturity or at the date the Company prepays the Hercules Term Loan. The Company may prepay all, but not less than all, of the Hercules Term Loan with no prepayment charge if prepaid after June 23, 2017. The Hercules Term Loan is secured by a first priority security interest and lien in and to all of the Company’s tangible and intangible properties and assets, including intellectual properties.

See Note 8 for a discussion of warrants to purchase common stock issued to Hercules in connection with the Hercules Term Loan.

10

The following is a summary of the Company’s long-term debt, net of unamortized debt discount and issuance costs for the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Principal amount	$	7,812	$	12,122
Less:     unamortized debt issuance costs		(16)		(41)
unamortized fair value of free standing warrant		(29)		(75)
Plus:     unamortized fair value debt premium		55		143
accrued terminal interest		303		310
accrued interest		52		83
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542
Secured promissory note, current portion		6,229		5,992
Secured promissory note, long-term portion		1,948		6,550
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542

For the three and nine months ended September 30, 2017, the Company recorded total interest expense of $0.2 million and $0.7 million, respectively. For the three and nine months ended September 30, 2016, the Company recorded interest expense of $0.3 million and $1.0 million, respectively, related to the Hercules Term Loan.

7. Commitments and Contingencies

The Company is not party to any material pending legal proceedings. However, the Company may from time to time become involved in litigation relating to claims arising in the ordinary course of business.

The Company has an operating lease with BMR-34790 Ardentech Court LP, an affiliate of BMR Holdings and related party, for its office, research and development, and manufacturing facilities in Fremont, California. On June 6, 2017, the Company entered into the seventh amendment to the existing lease (“Seventh Amendment”), effective as of May 30, 2017.

Under the Seventh Amendment, the Company extended the term of the Lease for the Company’s headquarters in Fremont, California through August 31, 2024, with an option to further extend the lease for an additional 65 months, subject to certain terms and conditions. The Company has agreed to pay a monthly base rent of $136,191 for the period commencing September 1, 2017, and ending on August 31, 2018, with an increase on September 1, 2018, and annual increases on September 1 of each subsequent year until the lease year beginning September 1, 2023. The Seventh Amendment also provides for rent abatements, subject to certain conditions, totaling $275,552 and certain tenant improvements to be completed at the Landlord’s expense (not to exceed $975,000 or, under certain conditions, $1,100,000). The Company will incur additional expense of approximately $0.4 million under the lease in connection with roof repairs that will be treated as additional rent and paid over the term of the lease.

For the three and nine months ended September 30, 2017, the Company recorded rental expense under the related party operating lease of $0.4 million and $0.8 million, respectively. For the three and nine months ended September 30, 2016, the Company recorded rental expense of $0.2 million and $0.5 million, respectively.

As of September 30, 2017, future minimum payments under the Company’s non-cancelable related party operating lease for each year ending December 31 are as follows (unaudited; in thousands):

		Total
Remainder of 2017	$		326
2018			1,558
2019			1,754
2020			1,807
2021 and thereafter			7,085
	$		12,530

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8. Stockholders’ Equity

On March 22, 2017, the Company closed on a registered public offering of 19,550,000 shares of common stock at a price of $1.50 per share, which included the exercise in full by the underwriters of their over-allotment option to purchase up to 2,550,000 additional shares of common stock. The total proceeds from the offering were $26.6 million, net of underwriter’s discounts and commissions and offering expenses.

In August 2016, the Company completed a private investment in public equity transaction (“PIPE Financing”). The Company entered into a Securities Purchase Agreement with various purchasers, including members of the Company’s Board of Directors and executive management, pursuant to which the Company sold and issued shares of common stock and warrants to purchase shares of common stock for aggregate gross proceeds of $7.5 million. Costs related to the offering were $0.9 million. Pursuant to the Purchase Agreement, the Company sold 4,800,000 common shares at $1.32 per common share, the closing price per share on August 15, 2016, for gross proceeds of $6.3 million. Additionally, 9,600,000 warrants were sold, at a price of $0.125 per warrant, for gross proceeds of $1.2 million. Each warrant grants the holder the right to purchase one share of the Company’s common stock. The Company granted 4,800,000 Series A Warrants and 4,800,000 Series B Warrants. Series A Warrants and Series B Warrants have a per share exercise price of $1.45 and $1.55, respectively. The Series A warrants expired on August 26, 2017 and the Series B Warrants will expire on August 19, 2021. Certain of our directors and executive officers purchased an aggregate of 275,454 shares of common stock and an aggregate of 550,908 warrants in this offering at the same price as the other investors. In connection with the PIPE Financing, the Company filed a registration statement on Form S-3, with the SEC registering for resale the shares of common stock issued in the PIPE Financing and the shares of common stock issuable upon exercise of the warrants. The registration statement was declared effective by the SEC on September 23, 2016.

The Company issued warrants to purchase common stock to Hercules in connection with the Hercules Term Loan entered into in June 2014 and amended in June 2015. The warrants are exercisable, in whole or in part, any time before their expiration date as set forth below. See Note 6 for a discussion of the Hercules Term Loan.

Below is a table summarizing the warrants issued and outstanding for each of the periods presented (unaudited):

	Warrants Outstanding as of   As of December 31,   2016		Warrants         Exercised		Warrants         Expired		Warrants Outstanding     As of September 30,     2017		Exercise     Price		Expiration     Date
PIPE Financing - Series A		4,800,000		1,844,214		2,955,786		-	$	1.45		8/26/2017
PIPE Financing - Series B		4,800,000		881,825		-		3,918,175	$	1.55		8/19/2021
Hercules - June 2014		31,674		-		-		31,674	$	8.84		1/27/2020
Hercules - June 2015		40,705		-		-		40,705	$	7.37		6/23/2020
Total		9,672,379		2,726,039		2,955,786		3,990,554

As of September 30, 2017, the Company had 3,990,554 warrants outstanding classified as equity warrants. Each warrant grants the holder the right to purchase one share of common stock. Equity warrants are recorded at their relative fair market value in the stockholders’ equity section of the balance sheet. The Company’s equity warrants can only be settled through the issuance of shares and do not have any anti-dilution or price reset provision. During the nine months ended September 30, 2017, warrants were exercised to purchase 2,726,039 shares of common stock for proceeds of approximately $4.0 million.

9. Stock-Based Compensation

In connection with the Company’s Initial Public Offering (“IPO”) of its common stock in January 2015, the Company’s board of directors terminated the Company’s 2012 Stock Incentive Plan (“2012 Plan”) effective as of January 27, 2015 and no further awards may be issued under the 2012 Plan. However, the awards outstanding under the 2012 Plan continue to be governed by the terms of the 2012 Plan. In July 2014, the board of directors and the stockholders of the Company adopted the 2014 Equity and Incentive Plan (“2014 Plan”), which became effective upon the closing of the IPO. As of September 30, 2017, options to purchase 1,642,899 shares of common stock were outstanding under the 2014 Plan with exercises prices ranging from $0.57 to $9.29 and with a weighted average exercise price of $1.30. Pursuant to the “evergreen” provision in the 2014 Plan, an additional 359,008 shares were automatically allocated for distribution under the 2014 Plan as of January 1, 2017 (“Evergreen Increase”).

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On September 7, 2016, the Company awarded an inducement option grant to the Company’s Chief Business Officer to purchase 252,000 shares of the Company’s common stock at an exercise price of $0.77 per share. On January 19, 2017, the Company awarded an inducement option to a new employee to purchase 35,000 shares of the Company’s common stock at an exercise price of $1.14 per share. These inducement option grants were issued outside of the existing equity compensation plans in accordance with NASDAQ listing rule 5635(c)(4). The inducement grants have a term of 10 years and vest at the rate of 25% of the shares on the first anniversary of the commencement of such employee’s employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date.

On November 2, 2016, the Company granted a total of 670,000 conditional stock options at $0.57 per share to certain executive officers. The conditional stock option grants were subject to approval by the Company’s stockholders of an amendment to the 2014 Plan that would increase the number of shares available for issuance by an amount sufficient to cover the new grants. 90,000 of these conditional stock options were forfeited upon the resignation of a former executive prior to stockholder approval of the plan amendment. On May 31, 2017, the stockholders of the Company approved an amendment to the 2014 Plan to increase the number of shares of common stock under the plan by 700,000 (the “Plan Amendment”). On June 5, 2017, the Company filed a Form S-8 Registration Statement which registered: (i) the 287,000 shares of common stock underlying the September 2016 and January 2017 inducement option grants, (ii) 700,000 shares of common stock added to the 2014 Plan pursuant to the Plan Amendment and (iii) 359,008 added to the Plan in connection with the Evergreen Increase.

On June 12, 2017, the Company awarded inducement grants to two new employees to purchase an aggregate of 100,000 shares of common stock at an exercise price of $1.36 per share. Each stock option has a ten-year term and vests over four years with 25% of the shares vesting on the first anniversary of the commencement of such employee’s employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date. These inducement option grants were issued outside of the existing equity compensation plans in accordance with NASDAQ listing rule 5635(c)(4).

The following table summarizes option and award activity, excluding grants outside of the existing equity compensation plans, for the nine months ended September 30, 2017 (unaudited):

	Shares     Available       for Grant		Outstanding   Number of Shares		Weighted- Average Exercise   Price per   Share		Weighted- Average Remaining   Contractual     Term (In Years)	Aggregate   Intrinsic Value
Balance at December 31, 2016		55,815		1,594,058	$	1.93	8.45	$	18,900
Additional shares reserved		1,059,008		-	$	-
Options granted (1)		(903,000)		903,000	$	0.72
Options exercised		-		(98,583)	$	1.40
Options cancelled/forfeited/expired		590,644		(590,644)	$	1.93
Restricted stock awards granted		(60,000)		-	$	-
Restricted stock award forfeited		26,666		-
Shares expired under 2012 Plan		(4,836)		-	$	-
Balance at September 30, 2017		764,297		1,807,831	$	1.35	8.42	$	140,000
Exercisable at September 30, 2017				487,827	$	2.25	6.28	$	18,750
Vested or expected to vest at September 30, 2017				1,690,463	$	1.38	8.36	$	130,827

(1) Includes conditional grants of 580,000 awarded in November 2016 and subsequently approved by shareholders in May 2017.

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The aggregate intrinsic values of options outstanding and exercisable, and vested and expected to vest were calculated as the difference between the exercise price of the options and the closing market value of the Company’s common stock as reported on NASDAQ as of September 30, 2017.

The following table summarizes the composition of stock options outstanding and exercisable under the 2012 Plan and the 2014 Plan, which excludes inducement grants, as of September 30, 2017 (unaudited):

	Options Outstanding						Options Exercisable
Exercise Price	Number of         Shares		Weighted- Average Remaining Contractual         Life (in  years)		Weighted         Average Exercise Price		Number of         Shares		Weighted         Average Exercise Price
$0.57 - $0.57		560,000		9.09	$	0.57		74,998	$	0.57
$0.85 - $0.85		383,500		9.22	$	0.85		-	$	-
$0.99 - $1.28		386,833		8.70	$	1.05		64,158	$	1.28
$1.40 - $2.57		413,197		6.70	$	2.27		304,554	$	2.22
$4.52 - $9.29		64,301		7.26	$	7.08		44,117	$	6.72

Stock-Based Compensation Expense

Total stock-based compensation expense recognized for grants under the approved option plans and inducement grants, was as follows (unaudited; in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Research and development	$	61	$	76	$	198	$	351
General and administrative		85		154		364		545
	$	146	$	230	$	562	$	896

As of September 30, 2017, the Company had $1.2 million of total unrecognized stock-based compensation expense, net of estimated forfeitures, related to outstanding stock options that will be recognized over a weighted-average period of 3.2 years.

The Company uses the Black-Scholes model for valuing its options and awards granted to employees and non-employees. The Black-Scholes option pricing model requires various highly judgmental assumptions including expected volatility and expected term. The expected volatility is based on the historical stock volatilities of several of the Company’s publicly listed peers as the Company does not have sufficient trading history to use the volatility of its own common stock. To estimate the expected term, the Company has opted to use the simplified method which is the use of the midpoint of the vesting term and the contractual term.

The following table illustrates the input assumptions used to value employee stock option grants for the periods presented (unaudited):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Dividend yield	0%	0%	0%	0%
Risk-free interest rate	1.94%	1.26%	1.90% - 2.13%	1.06% - 1.97%
Expected volatility	89%	89%	89%	89%
Expected term (years)	6.08	6.08	6.08	6.08

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10. Subsequent Events

On October 20, 2017, the Company entered into a purchase agreement and a registration rights agreement with an accredited investor, Lincoln Park Capital, LLC (“Lincoln Park”), an Illinois limited liability company. Under the terms and subject to the conditions of the purchase agreement, the Company has the right, but not the obligation, to sell to Lincoln Park, and Lincoln Park is obligated to purchase, up to $35.0 million worth of shares of the Company’s common stock.

In connection with the purchase agreement, the Company issued 227,500 shares of its common stock, as initial commitment shares, to Lincoln Park and the Company will issue, pro rata, up to an additional 227,500 shares of its common stock as additional commitment shares to Lincoln Park in connection with any additional purchases. As of the date of issuance of this report, no additional shares have been issued under the agreement. Such future sales of common stock by the Company, if any, will occur over the 30-month period commencing on the date that a registration statement, which the Company agreed to file with the SEC pursuant to the registration rights agreement, is declared effective by the SEC, a final prospectus in connection therewith is filed and the other conditions of the purchase agreement are satisfied (such time, the “Commencement”). As contemplated by the purchase agreement, from and after the Commencement and so long as the closing price of the Company’s common stock exceeds $0.50 per share, the Company may direct Lincoln Park, at its sole discretion, to purchase up to 300,000 shares of its common stock on any business day. The maximum number of shares that the Company may direct Lincoln Park to purchase in any single regular purchase may increase if the closing sale price of the common stock exceeds certain threshold prices at the time of sale as set forth in the purchase agreement, provided that Lincoln Park’s maximum obligation under any single regular purchase will not exceed $1.0 million.

Actual sales of shares of common stock to Lincoln Park under the purchase agreement will depend on a variety of factors to be determined by the Company from time to time, including, among others, market conditions, the trading price of the common stock and determinations by the Company as to the appropriate sources of funding for the Company and its operations. In addition, the Company is subject to a cap on the number of shares that may be issuable under the purchase agreement to the extent that the aggregate number of shares issued would breach the Company’s obligations under NASDAQ, which prohibits the issuance of more than 19.99% or approximately 7.8 million shares, of the Company’s outstanding shares of common stock as of August 4, 2017, unless stockholder approval is obtained, or unless the average prices at which shares are sold under the purchase agreement caused the transactions under the purchase agreement to be exempt from such limitations under applicable NASDAQ rules.

On November 1, 2017, the Company’s wholly owned subsidiary, ZP Opco, Inc., merged with and into the Company, with the Company surviving the merger.

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Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis should be read in conjunction with our financial statements and accompanying notes included in this Quarterly Report on Form 10-Q and the financial statements and accompanying notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed with the Securities and Exchange Commission, or SEC, on March 1, 2017, as amended. This discussion contains “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Such forward looking statements involve risks and uncertainties. We use words such as “may,” “continue,” “goal,” “would,” “could,” “might,” “project,” “anticipate,” “intend,” “forecast,” “designated,” “approximate,” “will,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “predict,” “potential,” “believe,” “should” or negatives of these words and similar expressions and references to future periods to identify forward-looking statements. Although we believe the expectations reflected in these forward- looking statements are reasonable, such statements are inherently subject to risk and we can give no assurances that our expectations will prove to be correct. These statements appearing throughout this Quarterly Report on Form 10-Q are statements regarding our intent, belief, or current expectations, primarily regarding our operations. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this Quarterly Report on Form 10-Q. As a result of many factors, such as those set forth under “Risk Factors” under Item 1A of Part II below, and elsewhere in this Quarterly Report on Form 10-Q, our actual results may differ materially from those anticipated in these forward-looking statements. We undertake no obligation to update these forward-looking statements to reflect events or circumstances after the date of this report or to reflect actual outcomes.

Overview

Zosano Pharma Corporation (“the Company”) is a clinical stage biopharmaceutical company focused on providing rapid systemic administration of therapeutics to patients using our proprietary Adhesive Dermally-Applied Microarray (“ADAM”) technology. In February 2017, we announced positive results from our ZOTRIP pivotal efficacy trial (“ZOTRIP trial”) that evaluated M207, which is our proprietary formulation of zolmitriptan delivered via our ADAM technology, as an acute treatment for migraine. We are focused on developing products where rapid administration of established molecules with known safety and efficacy profiles provides an increased benefit to patients, for markets where patients remain underserved by existing therapies. We anticipate that many of our current and future development programs may enable us to utilize a regulatory pathway that would streamline clinical development and accelerate the path towards commercialization.

ADAM is our proprietary, investigational technology platform designed to offer rapid drug absorption into the bloodstream, which can result in an improved pharmacokinetic profile compared to original dosage forms. ADAM consists of an array of drug-coated titanium microprojections mounted on an adhesive backing that is pressed on to the skin using a reusable handheld applicator. The microprojections penetrate the stratum corneum and allow drug to be absorbed into the microcapillary system of the skin. We focus on developing products based on our ADAM technology for indications in which rapid onset, ease of use and stability offer significant therapeutic and practical advantages, for markets where there is a need for more effective therapies.

Our development efforts are focused on our product candidate, M207. M207 is our proprietary formulation of zolmitriptan delivered utilizing our ADAM technology. Zolmitriptan is one of a class of serotonin receptor agonists known as triptans and is used as an acute treatment for migraine. Migraine is a debilitating neurological disease, symptoms of which include moderate to severe headache pain, nausea and vomiting, and abnormal sensitivity to light and sound. The objective of M207 is to provide faster onset of efficacy and sustained freedom from migraine symptoms by delivering rapid absorption while avoiding GI tract. In July 2016, we announced the dosing of the first subject in the ZOTRIP trial, a multicenter, double-blind, randomized, placebo-controlled trial comparing three doses of M207 (1.0mg, 1.9mg, and 3.8mg) to placebo for the treatment of a single migraine attack.

The results of the ZOTRIP trial demonstrated that the 3.8mg M207 dose achieved statistically significant pain freedom and most bothersome symptom freedom at two hours. While the 1.0mg and 1.9mg doses of M207 demonstrated statistical significance in pain freedom at two hours, they did not achieve statistical significance in freedom from most bothersome symptoms at two hours. In July 2017, we announced the publication of positive phase 1 data of zolmitriptan delivery in Future Medicine’s Pain Management Journal, and in October 2017, we announced publication of our clinical results from the ZOTRIP trial in Cephalalgia.

We have no product sales to date, and we will not have product sales unless and until we receive approval from the United States Food and Drug Administration (“FDA”) or equivalent foreign regulatory bodies, to market and sell M207 or any other product candidates. Accordingly, our success depends not only on the development, but also on our ability to finance the development of these product candidates. We will require substantial additional funding to complete development and seek regulatory approval for these product candidates. Additionally, we currently have no sales, marketing or distribution capabilities and thus our ability to market our product candidates in the future will depend in part on our ability to develop such capabilities either alone or with collaboration partners.

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M207 Clinical Trial and Long Term Safety Study

In November 2017, we announced the initiation of our long-term safety study for M207 as an acute treatment of migraine (“M207-ADAM”), with the enrollment of the first patient in the study. M207-ADAM is an open label study evaluating the safety of the 3.8mg dose of zolmitriptan in migraine patients who have historically experienced at least two migraines per month. Patients are expected to treat a minimum of two migraines per month, with no maximum treatment limits. The study will evaluate 150 patients for six months, and 50 patients for a year at approximately 30 sites in the U.S. The study is planned to be open-labeled, with investigator visits at months one, two, three, six, nine and twelve to record adverse events. We may elect to enroll more than the required number of patients to ensure a robust data set, and achievement of evaluable patients at each time point. The primary objective of M207-ADAM is to assess safety of M207 during repeated use over six and twelve months. Other endpoints are electrocardiography and laboratory parameters, as well as percentage of headaches with pain-free response.

We will require additional financing to complete this safety study. While we are pursuing clinical development and regulatory approval of our M207 product candidate through commercialization, we remain open to opportunities with potential strategic partners to ensure our product candidate will receive the best chance of commercial success.

In March 2017, we closed an underwritten public offering pursuant to a registration statement on Form S-1 of 19,550,000 shares of our common stock sold at a price of $1.50 per share, including 2,550,000 shares sold upon full exercise of the underwriters’ option to purchase additional shares of common stock. The proceeds from the offering were $29.3 million, and the net proceeds to us, after deducting underwriting discounts, commissions and reimbursable costs of approximately $2.2 million and offering expenses of approximately $0.5 million, were approximately $26.6 million.

Critical Accounting Policies and Significant Judgments and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The preparation of our financial statements in conformity with U.S. GAAP requires our management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates. Our management believes judgment is involved in determining revenue recognition, the fair value-based measurement of stock-based compensation, accruals and warrant valuations. Our management evaluates estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the financial statements. If our assumptions change, we may need to revise our estimates, or take other corrective actions, either of which may also have a material adverse effect on our results of operations, liquidity and financial condition.

We are an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012. Emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards, and, therefore, will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.

There have been no significant and material changes in our critical accounting policies and use of estimates during the nine months ended September 30, 2017, as compared to those disclosed in “Part II, Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Significant Judgments and Estimates” in our Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC.

Financial Operations Overview

As of September 30, 2017, we had an accumulated deficit of $218.4 million. We have incurred significant losses and expect to incur significant losses in the foreseeable future as we advance M207 into later stages of development, and if approved, commercialization.

We expect our research and development expenses related to clinical trials to increase significantly as we continue to advance M207 through clinical development. Because of the numerous risks and uncertainties associated with our technology and drug development, we are unable to predict the timing or amount of expenses incurred or when, or if, we will be able to achieve commercialization, revenue or profitability.

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Research and development expenses

Research and development expenses represent costs incurred to conduct research, such as the discovery and development of our proprietary product candidates. We recognize all research and development expenses as they are incurred.

Research and development expenses consist of:

• production costs which include, but are not limited to, employee-related expenses, including salaries, benefits and stock-based compensation expense, and fees paid to conduct nonclinical studies, drug formulation, and cost of consumables used in nonclinical and clinical trials;

• expenses related to the purchase of active pharmaceutical ingredients and raw materials for the production of product candidates based on our ADAM technology, including fees paid to contract manufacturing organizations (“CMOs”);

• fees paid to contract research organizations (“CROs”), clinical consultants, clinical trial sites and vendors, including institutional review boards (“IRBs”), in conjunction with implementing and monitoring our clinical trials and acquiring and evaluating clinical trial data, including all related fees, such as for investigator grants, patient screening fees, laboratory work and statistical compilation and analysis;

• fees paid to conduct clinical studies, drug formulation, and cost of consumables used in nonclinical and clinical trials;

• other consulting fees paid to third parties; and

• allocation of certain shared costs, such as facilities-related costs and information technology (“IT”) support services.

For the immediate future, our research and development efforts and resources will be focused primarily on advancing our product candidate M207 through clinical development.

We cannot forecast with any degree of certainty if any of our product candidates will be subject to future collaborations or how such arrangements would affect our development plans or capital requirements. As a result of the uncertainties discussed above, we are unable to determine the duration and completion costs of our research and development projects or when and to what extent we will generate revenue from the commercialization and sale of any of our product candidates.

General and administrative expenses

General and administrative expenses consist principally of personnel-related costs, professional fees for legal, consulting, audit and tax services, rent and other general operating expenses not otherwise included in research and development.

Other income and expenses

Interest expense, net. Interest expense, net of interest income, consists primarily of interest costs related to our debt and the amortization of debt discount and issuance costs. Interest expense for the three and nine months ended September 30, 2017 and 2016 reflects accrued and paid interest related to our secured term loan facility (“Hercules Term Loan”) with Hercules Capital, Inc. (“Hercules”), and the related amortization of debt discount and issuance costs.

Other income, net. Other income, net of other expense, consists of certain miscellaneous income or expenses that are not included in other categories of the condensed consolidated statements of operations. (See explanations under the subheading, Results of Operations).

Results of Operations

Comparison of the three months ended September 30, 2017 and 2016

Research and development expenses

	Three months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
Research and development		$5,683		$5,124		$ 559		11%

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Research and development expenses increased approximately $0.6 million, or 11%, for the three months ended September 30, 2017, as compared to the same period in 2016. The increase in research and development expense was primarily attributable to additional payroll related costs of $0.3 million, consulting expense of $0.3 million, medical affairs expense of $0.1 million and facilities expense of $0.3 million, resulting from the extension of our facilities lease. These increases were partially offset by lower clinical expenses of $0.6 million related to the efficacy trial in 2016 and long term safety study in 2017.

General and administrative expenses

	Three months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
General and administrative		$     2,036		$ 2,010		$ 26		1%

General and administrative expenses were approximately $2.0 million for the three months ended September 30, 2017 and 2016. Increases in expenses including $0.2 million for salaries and benefits and $0.1 million in facilities expenses were largely offset by decreases of $0.1 million in stock compensation expense and $0.1 million in legal and consulting expenses.

Other income (expense)

	Three months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
Interest expense, net		$        (154)		$      (314)		$  160		51%

Interest expense, net decreased approximately $0.2 million, or 51%, for the three months ended September 30, 2017, as compared to the same period in 2016. Interest expense is primarily attributable to the Hercules Term Loan. The decrease in interest expense is attributable to the lower interest costs resulting from the lower loan principal balance during the three months ended September 30, 2017, as compared to the same period in 2016.

Comparison of the nine months ended September 30, 2017 and 2016

In connection with our decision to concentrate on the clinical development of M207, in March 2016 we streamlined our organization and implemented a workforce reduction with the objective of reducing our expenses and reinvesting the savings from the workforce reduction in our M207 clinical development efforts.

Research and development expenses

	Nine months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
Research and development		$     14,672		$ 15,044		$      (372)		(2%)

Research and development expenses decreased approximately $0.4 million, or 2%, for the nine months ended September 30, 2017, as compared to the same period in 2016. The decrease in research and development expense was primarily attributable to lower clinical expenses of $1.0 million related to the ZOTRIP efficacy trial in 2016 and long term safety study in 2017, which was partially offset by increases in medical affairs expense of $0.4 million and facilities expense of $0.4 million, resulting from the extension of our facilities lease. Decreases of $0.9 million in payroll related costs, primarily due to the workforce reduction in 2016, were largely offset by increases of $0.6 million in consulting expense.

General and administrative expenses

	Nine months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
General and administrative		$        6,346		$      6,137		$  209		3%

General and administrative expenses increased approximately $0.2 million, or 3%, for the nine months ended September 30, 2017, as compared to the same period in 2016. The increase was primarily due to increases of $0.4 million for salaries and benefits, $0.1 million in facilities expenses and $0.1 million in legal and consulting expenses, partially offset by decreases in bonus and stock compensation of $0.4 million.

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Other income (expense)

	Nine months ended September 30,				Change
	2017		2016		Amount		%
	(In thousands)
Interest expense, net		$        (608)		$      (951)		$  343		36%
Other income, net		10		49		(39)		80%

Interest expense, net, decreased approximately $0.3 million, or 36%, for the nine months ended September 30, 2017, as compared to the same period in 2016. Interest expense is primarily attributable to the Hercules Term Loan. The decrease in interest expense is attributable to the lower interest costs resulting from the lower loan principal balance during the nine months ended September 30, 2017, as compared to the same period in 2016.

Other income was primarily comprised of gains from the sale of equipment during both periods presented.

Liquidity and Capital Resources

Since our inception in October 2006, we have funded our operations primarily through a combination of equity offerings, secured and unsecured borrowings from private investors, bank credit facilities, and licensing and service revenue from our license and collaboration agreements. We have incurred recurring operating losses and negative cash flows from operating activities since inception, and as of September 30, 2017, had an accumulated deficit of $218.4 million. We expect to incur additional losses in the future to conduct research and development of our M207 product candidate and to conduct pre-commercialization manufacturing activities. As of September 30, 2017, we had approximately $13.3 million in cash and cash equivalents. Presently, we do not have sufficient cash resources to meet our plans in the next twelve months following the issuance of these financial statements.

In accordance with ASU No. 2014-15 Presentation of Financial Statements – Going Concern (Subtopic 205-40), our management evaluates whether there are conditions or events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date that the financial statements are issued.

On October 20, 2017, we entered into a purchase agreement (“Lincoln Park Purchase Agreement”) and a registration rights agreement with an accredited investor, Lincoln Park Capital, LLC (“Lincoln Park”). Under the terms and subject to the conditions of the Lincoln Park Purchase Agreement, we have the right, but not the obligation, to sell to Lincoln Park up to $35.0 million worth of shares of our common stock. See Note 10 to the accompanying condensed consolidated financial statements for additional information on the Lincoln Park Purchase Agreement.

In addition to any proceeds we may receive for the sale of stock under the Lincoln Park Purchase Agreement, we will continue to require additional financing to develop our product candidates and fund operating losses. Our plans to meet our operating cash flow requirements include financing activities such as private placements of our common stock, preferred stock offerings, issuances of debt and convertible debt instruments and collaborative or other arrangements with corporate sources. We anticipate that we will need to raise substantial additional capital, the requirements of which will depend on many factors, including, but not limited to:

• the scope, progress, expansion, costs, and results of our clinical trials;

• the scope, progress, expansion, and costs of manufacturing our product candidates;

• the timing of and costs involved in obtaining regulatory approvals;

• the type, number, costs, and results of the product candidate development programs which we are pursuing or may choose to pursue in the future;

• our ability to establish and maintain development partnering arrangements;

• the timing, receipt and amount of contingent, royalty, and other payments from any of our future development partners;

• the emergence of competing technologies and other adverse market developments;

• the costs of maintaining, expanding, and protecting our intellectual property portfolio, including potential litigation costs and liabilities;

• the resources we devote to marketing, and if approved, commercializing our product candidates;

• our ability to draw funds from our loan and security agreement; and

• the costs associated with being a public company.

If we are unable to raise additional funds when needed, we may be required to delay, reduce, or terminate our development programs and clinical trials. We may also be required to sell or license to others technologies or clinical product candidates or programs that we would prefer to develop and commercialize ourselves.

20

These factors raise substantial doubt regarding our ability to continue as a going concern. There are no assurances that such additional funding will be achieved and that we will succeed in our future operations. Adequate additional funding may not be available to us on acceptable terms or at all. Our inability to obtain required funding in the near future or our inability to obtain funding on favorable terms will have a material adverse effect on our operations and strategic development plan for future growth. If we cannot successfully raise additional capital and implement our strategic development plan, our liquidity, financial condition and business prospects will be materially and adversely affected, and we may have to cease operations.

The following table shows a summary of our cash flows for the nine months ended September 30, 2017 and 2016:

	Nine Months Ended September 30,
	2017		2016
	(In thousands)
Net cash provided by (used in):
Operating activities	$	(20,955)	$	(18,804)
Investing activities		(7,247)		26,052
Financing activities		26,491		5,284
Net increase (decrease) in cash and cash equivalents	$	(1,711)	$	12,532

Operating Cash Flow: Net cash used in operating activities was approximately $21.0 million and $18.8 million for the nine months ended September 30, 2017 and 2016, respectively. Net cash used during the first nine months of 2017 was primarily due to the closing costs of the ZOTRIP trial, and start up costs for our upcoming long term safety study, in addition to other research and development and administrative expenses incurred in the course of our continuing operations. Net cash used during the first nine months of 2016 was primarily due to personnel costs related to the manufacturing of our M207 clinical trial materials, preclinical studies costs, start-up costs for the M207 efficacy trial, certain termination benefits paid to a former executive, costs associated with our workforce reduction in March 2016, and professional fees and administrative expenses incurred in the course of our continuing operations.

Investing Cash Flow: Net cash used in investing activities during the first nine months of 2017 was approximately $7.2 million as compared to net cash provided by investing activities of $26.1 million in the same period of 2016. Net cash used in investing activities during the first nine months of 2017 was primarily due to purchase of investments in marketable securities. Net cash provided by investing activities during the first nine months of 2016 was primarily the result of the maturity of certain marketable securities in our investment portfolio.

Financing Cash Flow: Net cash provided by financing activities was approximately $26.5 million and $5.3 million for the nine months ended September 30, 2017 and 2016, respectively. Net cash provided by financing activities for the first nine months of 2017 was primarily due to proceeds from a registered public offering of $26.6 million, net of underwriter’s discounts, commissions, and offering expenses and to warrant exercises to purchase 2,726,039 shares common stock for proceeds of $4.0 million. These increases were partially offset by payments on the Hercules Term Loan of approximately $4.3 million. Net cash provided by financing activities during the first nine months of 2016 was due to net proceeds of $6.6 million from the issuance of securities in private investment in public equity, which was completed in August 2016. Financing proceeds were offset by principal payments on the Hercules Term Loan of $1.4 million.

Contractual Obligations and Commitments

Our primary contractual obligations as of September 30, 2017, consist of operating leases of approximately $12.5 million and long-term debt obligations of approximately $8.6 million (including end of term payments and periodic interest payments). Operating leases represent our future minimum rental commitments under our operating leases. See Note 7 to the accompanying condensed consolidated financial statements for a discussion of the related party operating lease for our headquarters. Long-term debt obligations include the Hercules Term Loan, maturing in December 2018. See Note 6 to the accompanying condensed consolidated financial statements for a discussion of the Hercules Term Loan.

Recent Accounting Pronouncements

See Note 2 to the accompanying condensed consolidated financial statements for the Recent Accounting Pronouncements.

21

Off-Balance Sheet Arrangements

We currently have no off-balance sheet arrangements, such as structured finance, special purpose entities or variable interest entities.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risks in the ordinary course of our business. Financial instruments which potentially subject us to concentrations of credit risk consist principally of cash and cash equivalents, as well as investments in short-term marketable securities. We had cash and cash equivalents of $13.3 million as of September 30, 2017, which consisted of bank deposits, money market funds, and certain highly liquid investments. We also had investments in short-term marketable securities of $6.6 million, which consisted of certificates of deposit, commercial paper, corporate notes and bonds and U.S. government agency bonds.

Our cash and cash equivalents are held for working capital purposes. Cash balances are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to regulatory limits, and we are exposed to credit risk when our cash balances exceed FDIC insurance limits. Our total cash and cash equivalent balances exceed the maximum amounts insured by the FDIC.

Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates. We hold interest-earning instruments, which carry a degree of interest rate risk. In addition, the interest rate on our outstanding term loan is variable. To date, fluctuations in interest income and expense have not been significant. However, fluctuations in market interest rates in the future could have a material impact on our financial condition and results of operations.

Item 4.    Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of September 30, 2017. The term “disclosure controls and procedures,” as defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by the company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms.

Based on the evaluation of our disclosure controls and procedures as of September 30, 2017, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures are designed to, and are effective to, provide assurance at a reasonable level that the information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control over Financial Reporting

There were no changes in our internal controls over financial reporting during the quarter ended September 30, 2017, identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II.    OTHER INFORMATION

Item 1.         Legal Proceedings

We are not party to any material pending legal proceedings. However, we may from time to time become involved in litigation relating to claims arising in the ordinary course of our business.

Item 1A.       Risk Factors

Investing in our common stock involves a high degree of risk. Our Annual Report on Form 10-K for the year ended December 31, 2016 includes a detailed discussion of our risk factors under the heading “Part I, Item 1A—Risk Factors.” There have been no material changes from such risk factors during the nine months ended September 30, 2017. You should consider carefully the risk factors discussed in our Annual Report on Form 10-K for the year ended December 31, 2016, and all other information contained in or incorporated by reference in this Quarterly Report on Form 10-Q before making an investment decision. If any of the risks discussed in the Annual Report on Form 10-K actually occur, they may materially harm our business, financial condition, operating results, cash flows or growth prospects. As a result, the market price of our common stock could decline, and you could lose all or part of your investment. Additional risks and uncertainties that are not yet identified or that we think are immaterial may also materially harm our business, financial condition, operating results, cash flows or growth prospects and could result in a complete loss of your investment.

Item 2.         Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3.         Defaults Upon Senior Securities

None.

Item 4.         Mine Safety Disclosures

Not Applicable.

Item 5.         Other Information

None.

Item 6.         Exhibits

Exhibit  number	Description
10.1	Employment Letter Agreement, dated as of August 17, 2017 and effective as of August  9, 2017, among Zosano Pharma Corporation, ZP Opco, Inc. and John Walker (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-36570) filed on August 22, 2017)
31.1†	Certification of Principal Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2†	Certification of Principal Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS†	XBRL Instance Document XBRL
101.SCH†	XBRL Taxonomy Extension Schema Document
101.CAL†	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF†	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB†	XBRL Taxonomy Extension Label Linkbase Document
101.PRE†	XBRL Taxonomy Extension Presentation Linkbase Document

  † Filed herewith

 ^* Exhibit 32.1 is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, nor shall such exhibit be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as otherwise specifically stated in such filing.

23

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Dated:      November 9, 2017	Zosano Pharma Corporation  (Registrant)
	/s/ John Walker
	John Walker
	Chief Executive Officer
	/s/ Georgia Erbez
	Georgia Erbez
	Chief Financial Officer and Chief Business Officer

24

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO EXCHANGE ACT RULE 13a-14(a) AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John Walker, certify that:

1.   I have reviewed this Quarterly Report on Form 10-Q of Zosano Pharma Corporation;

2.   Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.   Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.   The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)   Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)   Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)   Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)   Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.   The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)   All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)   Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2017	By:	/s/ John Walker
		John Walker
		Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO EXCHANGE ACT RULE 13a-14(a) AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Georgia Erbez, certify that:

1.   I have reviewed this Quarterly Report on Form 10-Q of Zosano Pharma Corporation;

2.   Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.   Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.   The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)   Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)   Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)   Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)   Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.   The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)   All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)   Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2017	By:	/s/ Georgia Erbez
		Georgia Erbez
		Chief Financial Officer and Chief Business Officer
		(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, John Walker, the Chief Executive Officer of Zosano Pharma Corporation (the “Company”), and Georgia Erbez, the Chief Financial Officer and Chief Business Officer of the Company, hereby certify that, to their knowledge:

1.   The Quarterly Report on Form 10-Q for the period ended September 30, 2017 of the Company (the “Report”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

2.   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 9, 2017	By:	/s/ John Walker
		John Walker
		Chief Executive Officer
		(Principal Executive Officer)
Date: November 9, 2017	By:	/s/ Georgia Erbez
		Georgia Erbez
		Chief Financial Officer and Chief Business Officer
		(Principal Financial Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 03, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	ZSAN
Entity Registrant Name	Zosano Pharma Corp
Entity Central Index Key	0001587221
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		39,460,931

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 13,292	$ 15,003
Short-term investments in marketable securities	6,557	0
Prepaid expenses and other current assets	1,335	273
Total current assets	21,184	15,276
Restricted cash	35	35
Property and equipment, net	4,240	5,455
Other long-term assets	420	140
Total assets	25,879	20,906
Current liabilities:
Accounts payable	1,074	1,445
Accrued compensation	1,304	1,377
Secured promissory note (including accrued interest), net of issuance costs, current portion	6,229	5,992
Other accrued liabilities	768	1,005
Total current liabilities	9,375	9,819
Deferred rent	323	52
Secured promissory note (including accrued interest), net of issuance costs	1,948	6,550
Total liabilities	11,646	16,421
Commitments and contingencies (note 7)
Stockholders' equity:
Common stock, $0.0001 par value; 100,000,000 shares authorized as of September 30, 2017 and December 31, 2016; 39,233,431 and 16,815,997 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	4	2
Additional paid-in capital	232,614	201,252
Accumulated deficit	(218,385)	(196,769)
Stockholders' equity	14,233	4,485
Total liabilities and stockholders' equity	$ 25,879	$ 20,906

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	39,233,431	16,815,997
Common stock, shares outstanding	39,233,431	16,815,997

XML

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 0	$ 0	$ 0	$ 0
Operating expenses:
Research and development	5,683	5,124	14,672	15,044
General and administrative	2,036	2,010	6,346	6,137
Total operating expenses	7,719	7,134	21,018	21,181
Loss from operations	(7,719)	(7,134)	(21,018)	(21,181)
Other income (expense):
Interest expense, net	(154)	(314)	(608)	(951)
Other income, net	0	0	10	49
Loss before provision for income taxes	(7,873)	(7,448)	(21,616)	(22,083)
Provision for income taxes	0	0	0	0
Net loss	(7,873)	(7,448)	(21,616)	(22,083)
Other comprehensive gain (loss):
Unrealized gain (loss) on marketable securities, net of tax effect	2	(3)	0	(1)
Comprehensive loss	$ (7,871)	$ (7,451)	$ (21,616)	$ (22,084)
Net loss per common share - basic and diluted	$ (0.20)	$ (0.52)	$ (0.66)	$ (1.73)
Weighted-average shares used in computing net loss per common share - basic and diluted	39,228	14,259	32,991	12,752

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (21,616)	$ (22,083)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,902	1,866
Stock-based compensation	562	896
Gain on sale of equipment	(13)	(51)
Accretion of interest	44	241
Deferred rent	271	6
Change in operating assets and liabilities:
Prepaid expenses and other assets	(1,325)	(103)
Accounts payable	(370)	484
Accrued compensation and other accrued liabilities	(410)	(60)
Net cash used in operating activities	(20,955)	(18,804)
Cash flows from investing activities:
Purchase of property and equipment	(709)	(325)
Proceeds from sales of property and equipment	22	63
Purchase of marketable securities	(8,280)	0
Proceeds from maturities of investments in marketable securities	1,720	26,332
Increase in other investment	0	(18)
Net cash provided by (used in) investing activities	(7,247)	26,052
Cash flows from financing activities:
Proceeds from public offering of securities, net of underwriting commissions, discounts and other offering costs	26,623	0
Proceeds from exercise of warrants and issuance of common stock	4,041	0
Payment of loan principal	(4,310)	(1,364)
Proceeds from exercise of stock options and issuance of common stock	137	6
Net cash provided by financing activities	26,491	5,284
Net increase (decrease) in cash and cash equivalents	(1,711)	12,532
Cash and cash equivalents at beginning of period	15,003	6,646
Cash and cash equivalents at end of period	13,292	19,178
Supplemental cash flow information:
Interest paid	718	902
Non-cash investing activities:
Acquisition of property and equipment under accounts payable	45	0
Private Investment in Public Equity (PIPE) [Member]
Cash flows from financing activities:
Proceeds from issuance of securities	$ 0	$ 6,642

XML

Organization

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

1. Organization

The Company

 Zosano Pharma Corporation (“the Company”) is a clinical stage biopharmaceutical company focused on providing rapid systemic administration of therapeutics to patients using its proprietary Adhesive Dermally-Applied Microarray (“ADAM”) technology. In February 2017, the Company announced positive results from its ZOTRIP pivotal efficacy trial that evaluated M207, which is the Company’s proprietary formulation of zolmitriptan delivered via its ADAM technology, as an acute treatment for migraine. Zosano is focused on developing products where rapid administration of established molecules with known safety and efficacy profiles provides an increased benefit to patients, for markets where patients remain underserved by existing therapies. The Company anticipates that many of its current and future development programs may enable the Company to utilize a regulatory pathway that would streamline clinical development and accelerate the path towards commercialization.

As of September 30, 2017, Zosano Pharma Corporation has one wholly owned subsidiary, ZP Opco, Inc. (“Opco”), through which the Company conducts its primary research and development activities.

XML

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, the instructions to Form 10-Q and Regulation S-X. They do not include all the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2017, are not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or any other subsequent period. These financial statements should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2016, included in the Company’s annual report on Form 10-K filed with the U.S. Securities and Exchange Commission (“SEC”).

Use of Estimates

The preparation of the accompanying condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the periods reported. Actual results could differ from those estimates.

Liquidity and Substantial Doubt in Going Concern

 The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. GAAP, which contemplate continuation of the Company as a going concern. As of September 30, 2017, the Company has an accumulated deficit of $218.4 million, as well as recurring operating losses and negative cash flows from operating activities. Presently, the Company does not have sufficient cash resources to meet its plans in the next twelve months from issuance of this report.

The Company has financed its operations primarily through the sale of equity securities, debt financing and payments received under its former licensing and collaboration agreements with pharmaceutical companies. To date, none of the Company’s product candidates have been approved by the United States Food and Drug Administration for sale. The Company will continue to require additional financing to develop its product candidates and fund operating losses. Management intends to seek capital to support the Company’s initiatives through equity or debt financing, collaboration or other arrangements with corporate partners, and/or other sources of financing. However, if such financing is not available at adequate levels or on acceptable terms, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of or eliminate some of its development programs, out-license intellectual property rights, or a combination of the above, which may have a material adverse effect on the Company’s business, results of operations, financial condition and/or its ability to meet its scheduled obligations on a timely basis, if at all. Although management has been successful in raising capital in the past, there can be no assurance that the Company will be successful, or that any needed financing will be available in the future at terms acceptable to the Company. In October 2017, the Company entered into a stock purchase agreement with an accredited investor pursuant to which the Company can raise additional capital, subject to certain limitations and restrictions. However, even if the Company receives proceeds under this agreement, the Company will continue to require additional financing. See Note 10 for additional information on the October 2017 stock purchase agreement.

These factors raise substantial doubt regarding the Company’s ability to continue as a going concern within one year after the issuance of this report. There are no assurances that such additional funding will be achieved and that the Company will succeed in its future operations. The Company’s inability to obtain required funding in the near future or its inability to obtain funding on favorable terms will have a material adverse effect on its operations and strategic development plan for future growth. If the Company cannot successfully raise additional capital and implement its strategic development plan, its liquidity, financial condition and business prospects will be materially and adversely affected, and the Company may have to cease operations.

Consolidation

The condensed consolidated financial statements include the accounts of Zosano Pharma Corporation and Opco. Intercompany balances and transactions have been eliminated in consolidation.

Significant Accounting Policies

There have been no material changes to the Company’s significant accounting policies during the nine months ended September 30, 2017, as compared to the significant accounting policies described in Note 2 of the “Notes to Consolidated Financial Statements” in the Company’ s Annual Report on Form 10-K for the year ended December 31, 2016.

Research and Development Expenses

Research and development costs are charged to expense as incurred and consist of costs related to (i) furthering the Company’s research and development efforts, and (ii) designing and manufacturing products that incorporate the Company’s ADAM technology for the Company’s clinical and nonclinical studies.

Net Loss Per Common Share

Basic net income (loss) per common share is calculated by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive common stock equivalents. Diluted net income (loss) per common share is computed by giving effect to all potentially dilutive common stock equivalents outstanding for the period. For purposes of this calculation, warrants and options to purchase common stock are considered potentially dilutive common stock equivalents. For the three and nine months ended September 30, 2017 and 2016, diluted net loss per common share was the same as basic net loss per common share since the effect of inclusion of potentially dilutive common stock equivalents would have an antidilutive effect due to the loss reported.

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive (unaudited; shares in thousands):

	September 30,
	2017		2016
Warrants to purchase common stock		3,991		9,672
Options to purchase common stock		2,195		1,373
		6,186		11,045

 Recent Accounting Pronouncements

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Compensation – Stock Compensation; Scope of Modification Accounting. This ASU provides guidance on which changes to the terms and conditions of a share-based payment award constitute a modification. This amendment is effective for all entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income Gain and Losses from the Derecognition of Nonfinancial Assets. Under ASU 2017-05, all entities are required to derecognize or deconsolidate a business or nonprofit activity in accordance with Topic 810. The amendments in this update also simplify U.S. GAAP by eliminating several accounting differences between transactions involving assets and transactions involving businesses. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows. This ASU provides guidance on the presentation of cash, cash equivalents and restricted cash in the statement of cash flows to reduce the current diversity in practice. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. Under the new guidance, lessees will be required to recognize substantially all leases on the balance sheet as a right-of-use asset and recognize a corresponding lease liability. The accounting applied by a lessor is largely unchanged from that applied under previous U.S. GAAP. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities, which amends the guidance in U.S. GAAP on the classification and measurement of financial instruments. Changes to the current guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

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Cash, Cash Equivalents and Investments

9 Months Ended

Sep. 30, 2017

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Investments

3. Cash, Cash Equivalents and Investments

The Company classifies all highly liquid investments with maturities of three months or less at the date of purchase as cash equivalents. The following is a summary of the Company’s cash, cash equivalents, and marketable securities investments for each of the periods presented (in thousands):

	September 30, 2017
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
	(unaudited)
Cash in bank	$	10,836	$	-	$	-	$	10,836
Money market funds		1,954		-		-		1,954
Certificates of deposit (restricted)		35		-		-		35
Certificates of deposit		3,404		-		-		3,404
Commercial paper		250		-		-		250
Corporate notes and bonds		2,006		-		-		2,006
U.S. government agency bonds		1,399		-		-		1,399
	$	19,884	$	-	$	-	$	19,884
Classified as:
Cash and cash equivalents							$	13,292
Restricted cash								35
Short-term investments in marketable securities								6,557
							$	19,884

	December 31, 2016
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
Cash in bank	$	3,342	$	-	$	-	$	3,342
Money market funds		11,661		-		-		11,661
Certificates of deposit (restricted)		35		-		-		35
	$	15,038	$	-	$	-	$	15,038
Classified as:
Cash and cash equivalents							$	15,003
Restricted cash								35
							$	15,038

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Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

4. Fair Value of Financial Instruments

The Company records its financial assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows:

• Level 1: Inputs which include quoted prices in active markets for identical assets and liabilities.

• Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The carrying values of certain assets and liabilities of the Company, such as cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable and accrued liabilities, approximate fair value due to their relatively short maturities. The carrying value of the Company’s short-term notes payable approximates their fair value as the terms of the borrowing are consistent with current market rates and the duration to maturity is short. The carrying value of the Company’s long-term notes payable approximates fair value because the interest rates approximate market rates that the Company could obtain for debt with similar terms and maturities.

The following tables set forth the fair value of the Company’s financial instruments for each of the periods presented (in thousands):

	September 30, 2017
	Level I		Level II		Level III		Total
	(unaudited)
Financial Assets:
Money market funds	$	1,954	$	-	$	-	$	1,954
Certificates of deposit		-		3,404		-		3,404
Commercial paper		-		250		-		250
Corporate notes and bonds		-		2,006		-		2,006
U.S. government agency bonds		-		1,399		-		1,399
Total financial assets	$	1,954	$	7,059	$	-	$	9,013
	December 31, 2016
	Level I		Level II		Level III		Total
Financial Assets:
Money market funds	$	11,661	$	-	$	-	$	11,661
Total financial assets	$	11,661	$	-	$	-	$	11,661

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Property and Equipment

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

5. Property and Equipment

The following summarizes the Company’s property and equipment for each of the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Laboratory and office equipment	$	1,350	$	1,127
Manufacturing equipment		10,969		10,857
Computer equipment and software		340		314
Leasehold improvements		15,705		15,694
Construction in progress		2,182		1,961
		30,546		29,953
Less: accumulated depreciation		(26,306)		(24,498)
	$	4,240	$	5,455

Depreciation and amortization expense was approximately $0.6 million for both the three months ended September 30, 2017 and 2016. Depreciation and amortization expense was $1.9 million for the both the nine months ended September 30, 2017 and 2016.

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Debt Financing

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Debt Financing

6. Debt Financing

In June 2014, the Company entered into a loan and security agreement with Hercules Capital, Inc. (“Hercules”) which provided the Company $4.0 million in debt financing. In June 2015, the Company entered into a first amendment to the loan and security agreement with Hercules to increase the aggregate principal amount of the loan to $15.0 million (“Hercules Term Loan”). Upon the execution of the first amendment to the loan and security agreement, the Company used approximately $11.4 million of the Hercules Term Loan to prepay all amounts owing under the secured promissory note held by BMV Direct SOTRS LP, an affiliate of BioMed Realty Holdings, Inc. (“BMR Holdings”). BMV Direct SOTRS LP owns more than 5% of the Company’s common stock and therefore is a beneficial owner of the Company.

The Hercules Term Loan provides that the $15.0 million principal balance will be subject to a 12-month interest-only period beginning July 1, 2015, followed by equal monthly installment payments of principal and interest, with all outstanding amounts due and payable on December 1, 2018. The outstanding principal balance bears interest at a variable rate of the greater of (i) 7.95%, or (ii) 7.95% plus the prime rate as quoted in the Wall Street Journal minus 5.25%. The interest rate on the Hercules Term Loan was 7.95% as of September 30, 2017, and December 31, 2016. On June 1, 2017, the Company paid a $100,000 legacy end of term charge and will pay an additional $351,135 end of term charge on the earlier of loan maturity or at the date the Company prepays the Hercules Term Loan. The Company may prepay all, but not less than all, of the Hercules Term Loan with no prepayment charge if prepaid after June 23, 2017. The Hercules Term Loan is secured by a first priority security interest and lien in and to all of the Company’s tangible and intangible properties and assets, including intellectual properties.

See Note 8 for a discussion of warrants to purchase common stock issued to Hercules in connection with the Hercules Term Loan.

The following is a summary of the Company’s long-term debt, net of unamortized debt discount and issuance costs for the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Principal amount	$	7,812	$	12,122
Less:     unamortized debt issuance costs		(16)		(41)
unamortized fair value of free standing warrant		(29)		(75)
Plus:     unamortized fair value debt premium		55		143
accrued terminal interest		303		310
accrued interest		52		83
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542
Secured promissory note, current portion		6,229		5,992
Secured promissory note, long-term portion		1,948		6,550
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542

For the three and nine months ended September 30, 2017, the Company recorded total interest expense of $0.2 million and $0.7 million, respectively. For the three and nine months ended September 30, 2016, the Company recorded interest expense of $0.3 million and $1.0 million, respectively, related to the Hercules Term Loan.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

The Company is not party to any material pending legal proceedings. However, the Company may from time to time become involved in litigation relating to claims arising in the ordinary course of business.

The Company has an operating lease with BMR-34790 Ardentech Court LP, an affiliate of BMR Holdings and related party, for its office, research and development, and manufacturing facilities in Fremont, California. On June 6, 2017, the Company entered into the seventh amendment to the existing lease (“Seventh Amendment”), effective as of May 30, 2017.

Under the Seventh Amendment, the Company extended the term of the Lease for the Company’s headquarters in Fremont, California through August 31, 2024, with an option to further extend the lease for an additional 65 months, subject to certain terms and conditions. The Company has agreed to pay a monthly base rent of $136,191 for the period commencing September 1, 2017, and ending on August 31, 2018, with an increase on September 1, 2018, and annual increases on September 1 of each subsequent year until the lease year beginning September 1, 2023. The Seventh Amendment also provides for rent abatements, subject to certain conditions, totaling $275,552 and certain tenant improvements to be completed at the Landlord’s expense (not to exceed $975,000 or, under certain conditions, $1,100,000). The Company will incur additional expense of approximately $0.4 million under the lease in connection with roof repairs that will be treated as additional rent and paid over the term of the lease.

For the three and nine months ended September 30, 2017, the Company recorded rental expense under the related party operating lease of $0.4 million and $0.8 million, respectively. For the three and nine months ended September 30, 2016, the Company recorded rental expense of $0.2 million and $0.5 million, respectively.

As of September 30, 2017, future minimum payments under the Company’s non-cancelable related party operating lease for each year ending December 31 are as follows (unaudited; in thousands):

		Total
Remainder of 2017	$		326
2018			1,558
2019			1,754
2020			1,807
2021 and thereafter			7,085
	$		12,530

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Stockholders' Equity

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Stockholders' Equity

8. Stockholders’ Equity

On March 22, 2017, the Company closed on a registered public offering of 19,550,000 shares of common stock at a price of $1.50 per share, which included the exercise in full by the underwriters of their over-allotment option to purchase up to 2,550,000 additional shares of common stock. The total proceeds from the offering were $26.6 million, net of underwriter’s discounts and commissions and offering expenses.

In August 2016, the Company completed a private investment in public equity transaction (“PIPE Financing”). The Company entered into a Securities Purchase Agreement with various purchasers, including members of the Company’s Board of Directors and executive management, pursuant to which the Company sold and issued shares of common stock and warrants to purchase shares of common stock for aggregate gross proceeds of $7.5 million. Costs related to the offering were $0.9 million. Pursuant to the Purchase Agreement, the Company sold 4,800,000 common shares at $1.32 per common share, the closing price per share on August 15, 2016, for gross proceeds of $6.3 million. Additionally, 9,600,000 warrants were sold, at a price of $0.125 per warrant, for gross proceeds of $1.2 million. Each warrant grants the holder the right to purchase one share of the Company’s common stock. The Company granted 4,800,000 Series A Warrants and 4,800,000 Series B Warrants. Series A Warrants and Series B Warrants have a per share exercise price of $1.45 and $1.55, respectively. The Series A warrants expired on August 26, 2017 and the Series B Warrants will expire on August 19, 2021. Certain of our directors and executive officers purchased an aggregate of 275,454 shares of common stock and an aggregate of 550,908 warrants in this offering at the same price as the other investors. In connection with the PIPE Financing, the Company filed a registration statement on Form S-3, with the SEC registering for resale the shares of common stock issued in the PIPE Financing and the shares of common stock issuable upon exercise of the warrants. The registration statement was declared effective by the SEC on September 23, 2016.

The Company issued warrants to purchase common stock to Hercules in connection with the Hercules Term Loan entered into in June 2014 and amended in June 2015. The warrants are exercisable, in whole or in part, any time before their expiration date as set forth below. See Note 6 for a discussion of the Hercules Term Loan.

Below is a table summarizing the warrants issued and outstanding for each of the periods presented (unaudited):

	Warrants Outstanding as of   As of December 31,   2016		Warrants         Exercised		Warrants         Expired		Warrants Outstanding     As of September 30,     2017		Exercise     Price		Expiration     Date
PIPE Financing - Series A		4,800,000		1,844,214		2,955,786		-	$	1.45		8/26/2017
PIPE Financing - Series B		4,800,000		881,825		-		3,918,175	$	1.55		8/19/2021
Hercules - June 2014		31,674		-		-		31,674	$	8.84		1/27/2020
Hercules - June 2015		40,705		-		-		40,705	$	7.37		6/23/2020
Total		9,672,379		2,726,039		2,955,786		3,990,554

As of September 30, 2017, the Company had 3,990,554 warrants outstanding classified as equity warrants. Each warrant grants the holder the right to purchase one share of common stock. Equity warrants are recorded at their relative fair market value in the stockholders’ equity section of the balance sheet. The Company’s equity warrants can only be settled through the issuance of shares and do not have any anti-dilution or price reset provision. During the nine months ended September 30, 2017, warrants were exercised to purchase 2,726,039 shares of common stock for proceeds of approximately $4.0 million.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

9. Stock-Based Compensation

In connection with the Company’s Initial Public Offering (“IPO”) of its common stock in January 2015, the Company’s board of directors terminated the Company’s 2012 Stock Incentive Plan (“2012 Plan”) effective as of January 27, 2015 and no further awards may be issued under the 2012 Plan. However, the awards outstanding under the 2012 Plan continue to be governed by the terms of the 2012 Plan. In July 2014, the board of directors and the stockholders of the Company adopted the 2014 Equity and Incentive Plan (“2014 Plan”), which became effective upon the closing of the IPO. As of September 30, 2017, options to purchase 1,642,899 shares of common stock were outstanding under the 2014 Plan with exercises prices ranging from $0.57 to $9.29 and with a weighted average exercise price of $1.30. Pursuant to the “evergreen” provision in the 2014 Plan, an additional 359,008 shares were automatically allocated for distribution under the 2014 Plan as of January 1, 2017 (“Evergreen Increase”).

On September 7, 2016, the Company awarded an inducement option grant to the Company’s Chief Business Officer to purchase 252,000 shares of the Company’s common stock at an exercise price of $0.77 per share. On January 19, 2017, the Company awarded an inducement option to a new employee to purchase 35,000 shares of the Company’s common stock at an exercise price of $1.14 per share. These inducement option grants were issued outside of the existing equity compensation plans in accordance with NASDAQ listing rule 5635(c)(4). The inducement grants have a term of 10 years and vest at the rate of 25% of the shares on the first anniversary of the commencement of such employee’s employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date.

On November 2, 2016, the Company granted a total of 670,000 conditional stock options at $0.57 per share to certain executive officers. The conditional stock option grants were subject to approval by the Company’s stockholders of an amendment to the 2014 Plan that would increase the number of shares available for issuance by an amount sufficient to cover the new grants. 90,000 of these conditional stock options were forfeited upon the resignation of a former executive prior to stockholder approval of the plan amendment. On May 31, 2017, the stockholders of the Company approved an amendment to the 2014 Plan to increase the number of shares of common stock under the plan by 700,000 (the “Plan Amendment”). On June 5, 2017, the Company filed a Form S-8Registration Statement which registered: (i) the 287,000 shares of common stock underlying the September 2016 and January 2017 inducement option grants, (ii) 700,000 shares of common stock added to the 2014 Plan pursuant to the Plan Amendment and (iii) 359,008 added to the Plan in connection with the Evergreen Increase.

On June 12, 2017, the Company awarded inducement grants to two new employees to purchase an aggregate of 100,000 shares of common stock at an exercise price of $1.36 per share. Each stock option has a ten-year term and vests over four years with 25% of the shares vesting on the first anniversary of the commencement of such employee’s employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date. These inducement option grants were issued outside of the existing equity compensation plans in accordance with NASDAQ listing rule 5635(c)(4).

The following table summarizes option and award activity, excluding grants outside of the existing equity compensation plans, for the nine months ended September 30, 2017 (unaudited):

	Shares     Available       for Grant		Outstanding   Number of Shares		Weighted- Average Exercise   Price per   Share		Weighted- Average Remaining   Contractual     Term (In Years)	Aggregate   Intrinsic Value
Balance at December 31, 2016		55,815		1,594,058	$	1.93	8.45	$	18,900
Additional shares reserved		1,059,008		-	$	-
Options granted (1)		(903,000)		903,000	$	0.72
Options exercised		-		(98,583)	$	1.40
Options cancelled/forfeited/expired		590,644		(590,644)	$	1.93
Restricted stock awards granted		(60,000)		-	$	-
Restricted stock award forfeited		26,666		-
Shares expired under 2012 Plan		(4,836)		-	$	-
Balance at September 30, 2017		764,297		1,807,831	$	1.35	8.42	$	140,000
Exercisable at September 30, 2017				487,827	$	2.25	6.28	$	18,750
Vested or expected to vest at September 30, 2017				1,690,463	$	1.38	8.36	$	130,827

(1) Includes conditional grants of 580,000 awarded in November 2016 and subsequently approved by shareholders in May 2017.

The aggregate intrinsic values of options outstanding and exercisable, and vested and expected to vest were calculated as the difference between the exercise price of the options and the closing market value of the Company’s common stock as reported on NASDAQ as of September 30, 2017.

The following table summarizes the composition of stock options outstanding and exercisable under the 2012 Plan and the 2014 Plan, which excludes inducement grants, as of September 30, 2017 (unaudited):

	Options Outstanding						Options Exercisable
Exercise Price	Number of         Shares		Weighted- Average Remaining Contractual         Life (in  years)		Weighted         Average Exercise Price		Number of         Shares		Weighted         Average Exercise Price
$0.57 - $0.57		560,000		9.09	$	0.57		74,998	$	0.57
$0.85 - $0.85		383,500		9.22	$	0.85		-	$	-
$0.99 - $1.28		386,833		8.70	$	1.05		64,158	$	1.28
$1.40 - $2.57		413,197		6.70	$	2.27		304,554	$	2.22
$4.52 - $9.29		64,301		7.26	$	7.08		44,117	$	6.72

Stock-Based Compensation Expense

Total stock-based compensation expense recognized for grants under the approved option plans and inducement grants, was as follows (unaudited; in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Research and development	$	61	$	76	$	198	$	351
General and administrative		85		154		364		545
	$	146	$	230	$	562	$	896

As of September 30, 2017, the Company had $1.2 million of total unrecognized stock-based compensation expense, net of estimated forfeitures, related to outstanding stock options that will be recognized over a weighted-average period of 3.2 years.

The Company uses the Black-Scholes model for valuing its options and awards granted to employees and non-employees. The Black-Scholes option pricing model requires various highly judgmental assumptions including expected volatility and expected term. The expected volatility is based on the historical stock volatilities of several of the Company’s publicly listed peers as the Company does not have sufficient trading history to use the volatility of its own common stock. To estimate the expected term, the Company has opted to use the simplified method which is the use of the midpoint of the vesting term and the contractual term.

The following table illustrates the input assumptions used to value employee stock option grants for the periods presented (unaudited):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Dividend yield	0%	0%	0%	0%
Risk-free interest rate	1.94%	1.26%	1.90% - 2.13%	1.06% - 1.97%
Expected volatility	89%	89%	89%	89%
Expected term (years)	6.08	6.08	6.08	6.08

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Subsequent Events

9 Months Ended

Sep. 30, 2017

Subsequent Events [Abstract]

Subsequent Events

10. Subsequent Events

On October 20, 2017, the Company entered into a purchase agreement and a registration rights agreement with an accredited investor, Lincoln Park Capital, LLC (“Lincoln Park”), an Illinois limited liability company. Under the terms and subject to the conditions of the purchase agreement, the Company has the right, but not the obligation, to sell to Lincoln Park, and Lincoln Park is obligated to purchase, up to $35.0 million worth of shares of the Company’s common stock.

In connection with the purchase agreement, the Company issued 227,500 shares of its common stock, as initial commitment shares, to Lincoln Park and the Company will issue, pro rata, up to an additional 227,500 shares of its common stock as additional commitment shares to Lincoln Park in connection with any additional purchases. As of the date of issuance of this report, no additional shares have been issued under the agreement. Such future sales of common stock by the Company, if any, will occur over the 30-month period commencing on the date that a registration statement, which the Company agreed to file with the SEC pursuant to the registration rights agreement, is declared effective by the SEC, a final prospectus in connection therewith is filed and the other conditions of the purchase agreement are satisfied (such time, the “Commencement”). As contemplated by the purchase agreement, from and after the Commencement and so long as the closing price of the Company’s common stock exceeds $0.50 per share, the Company may direct Lincoln Park, at its sole discretion, to purchase up to 300,000 shares of its common stock on any business day. The maximum number of shares that the Company may direct Lincoln Park to purchase in any single regular purchase may increase if the closing sale price of the common stock exceeds certain threshold prices at the time of sale as set forth in the purchase agreement, provided that Lincoln Park’s maximum obligation under any single regular purchase will not exceed $1.0 million.

Actual sales of shares of common stock to Lincoln Park under the purchase agreement will depend on a variety of factors to be determined by the Company from time to time, including, among others, market conditions, the trading price of the common stock and determinations by the Company as to the appropriate sources of funding for the Company and its operations. In addition, the Company is subject to a cap on the number of shares that may be issuable under the purchase agreement to the extent that the aggregate number of shares issued would breach the Company’s obligations under NASDAQ, which prohibits the issuance of more than 19.99% or approximately 7.8 million shares, of the Company’s outstanding shares of common stock as of August 4, 2017, unless stockholder approval is obtained, or unless the average prices at which shares are sold under the purchase agreement caused the transactions under the purchase agreement to be exempt from such limitations under applicable NASDAQ rules.

On November 1, 2017, the Company’s wholly owned subsidiary, ZP Opco, Inc., merged with and into the Company, with the Company surviving the merger.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, the instructions to Form 10-Q and Regulation S-X. They do not include all the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2017, are not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or any other subsequent period. These financial statements should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2016, included in the Company’s annual report on Form 10-K filed with the U.S. Securities and Exchange Commission (“SEC”).

Use of Estimates

Use of Estimates

The preparation of the accompanying condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the periods reported. Actual results could differ from those estimates.

Liquidity and Substantial Doubt in Going Concern

Liquidity and Substantial Doubt in Going Concern

 The accompanying condensed consolidated financial statements have been prepared in conformity with U.S. GAAP, which contemplate continuation of the Company as a going concern. As of September 30, 2017, the Company has an accumulated deficit of $218.4 million, as well as recurring operating losses and negative cash flows from operating activities. Presently, the Company does not have sufficient cash resources to meet its plans in the next twelve months from issuance of this report.

The Company has financed its operations primarily through the sale of equity securities, debt financing and payments received under its former licensing and collaboration agreements with pharmaceutical companies. To date, none of the Company’s product candidates have been approved by the United States Food and Drug Administration for sale. The Company will continue to require additional financing to develop its product candidates and fund operating losses. Management intends to seek capital to support the Company’s initiatives through equity or debt financing, collaboration or other arrangements with corporate partners, and/or other sources of financing. However, if such financing is not available at adequate levels or on acceptable terms, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of or eliminate some of its development programs, out-license intellectual property rights, or a combination of the above, which may have a material adverse effect on the Company’s business, results of operations, financial condition and/or its ability to meet its scheduled obligations on a timely basis, if at all. Although management has been successful in raising capital in the past, there can be no assurance that the Company will be successful, or that any needed financing will be available in the future at terms acceptable to the Company. In October 2017, the Company entered into a stock purchase agreement with an accredited investor pursuant to which the Company can raise additional capital, subject to certain limitations and restrictions. However, even if the Company receives proceeds under this agreement, the Company will continue to require additional financing. See Note 10 for additional information on the October 2017 stock purchase agreement.

These factors raise substantial doubt regarding the Company’s ability to continue as a going concern within one year after the issuance of this report. There are no assurances that such additional funding will be achieved and that the Company will succeed in its future operations. The Company’s inability to obtain required funding in the near future or its inability to obtain funding on favorable terms will have a material adverse effect on its operations and strategic development plan for future growth. If the Company cannot successfully raise additional capital and implement its strategic development plan, its liquidity, financial condition and business prospects will be materially and adversely affected, and the Company may have to cease operations.

Consolidation

Consolidation

The condensed consolidated financial statements include the accounts of Zosano Pharma Corporation and Opco. Intercompany balances and transactions have been eliminated in consolidation.

Research and Development Expenses

Research and Development Expenses

Research and development costs are charged to expense as incurred and consist of costs related to (i) furthering the Company’s research and development efforts, and (ii) designing and manufacturing products that incorporate the Company’s ADAM technology for the Company’s clinical and nonclinical studies.

Net Loss Per Common Share

Net Loss Per Common Share

Basic net income (loss) per common share is calculated by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive common stock equivalents. Diluted net income (loss) per common share is computed by giving effect to all potentially dilutive common stock equivalents outstanding for the period. For purposes of this calculation, warrants and options to purchase common stock are considered potentially dilutive common stock equivalents. For the three and nine months ended September 30, 2017 and 2016, diluted net loss per common share was the same as basic net loss per common share since the effect of inclusion of potentially dilutive common stock equivalents would have an antidilutive effect due to the loss reported.

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive (unaudited; shares in thousands):

	September 30,
	2017		2016
Warrants to purchase common stock		3,991		9,672
Options to purchase common stock		2,195		1,372
		6,186		11,044

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Compensation – Stock Compensation; Scope of Modification Accounting. This ASU provides guidance on which changes to the terms and conditions of a share-based payment award constitute a modification. This amendment is effective for all entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income Gain and Losses from the Derecognition of Nonfinancial Assets. Under ASU 2017-05, all entities are required to derecognize or deconsolidate a business or nonprofit activity in accordance with Topic 810. The amendments in this update also simplify U.S. GAAP by eliminating several accounting differences between transactions involving assets and transactions involving businesses. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted. The Company is currently evaluating the impact of this accounting standard.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows. This ASU provides guidance on the presentation of cash, cash equivalents and restricted cash in the statement of cash flows to reduce the current diversity in practice. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. Adoption of this standard is not expected to have a material impact on the financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. Under the new guidance, lessees will be required to recognize substantially all leases on the balance sheet as a right-of-use asset and recognize a corresponding lease liability. The accounting applied by a lessor is largely unchanged from that applied under previous U.S. GAAP. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities, which amends the guidance in U.S. GAAP on the classification and measurement of financial instruments. Changes to the current guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the impact of this accounting standard.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Schedule of Outstanding Common Stock Equivalents Excluded From Computations of Diluted Net Loss per Common Share

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive (unaudited; shares in thousands):

	September 30,
	2017		2016
Warrants to purchase common stock		3,991		9,672
Options to purchase common stock		2,195		1,373
		6,186		11,045

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Cash, Cash Equivalents and Investments (Tables)

9 Months Ended

Sep. 30, 2017

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents, and Marketable Security Investments

The Company classifies all highly liquid investments with maturities of three months or less at the date of purchase as cash equivalents. The following is a summary of the Company’s cash, cash equivalents, and marketable securities investments for each of the periods presented (in thousands):

	September 30, 2017
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
	(unaudited)
Cash in bank	$	10,836	$	-	$	-	$	10,836
Money market funds		1,954		-		-		1,954
Certificates of deposit (restricted)		35		-		-		35
Certificates of deposit		3,404		-		-		3,404
Commercial paper		250		-		-		250
Corporate notes and bonds		2,006		-		-		2,006
U.S. government agency bonds		1,399		-		-		1,399
	$	19,884	$	-	$	-	$	19,884
Classified as:
Cash and cash equivalents							$	13,292
Restricted cash								35
Short-term investments in marketable securities								6,557
							$	19,884

	December 31, 2016
	Cost		Gross Unrealized     Gains		Gross Unrealized     Losses		Fair Value
Cash in bank	$	3,342	$	-	$	-	$	3,342
Money market funds		11,661		-		-		11,661
Certificates of deposit (restricted)		35		-		-		35
	$	15,038	$	-	$	-	$	15,038
Classified as:
Cash and cash equivalents							$	15,003
Restricted cash								35
							$	15,038

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Financial Instruments

The following tables set forth the fair value of the Company’s financial instruments for each of the periods presented (in thousands):

	September 30, 2017
	Level I		Level II		Level III		Total
	(unaudited)
Financial Assets:
Money market funds	$	1,954	$	-	$	-	$	1,954
Certificates of deposit		-		3,404		-		3,404
Commercial paper		-		250		-		250
Corporate notes and bonds		-		2,006		-		2,006
U.S. government agency bonds		-		1,399		-		1,399
Total financial assets	$	1,954	$	7,059	$	-	$	9,013
	December 31, 2016
	Level I		Level II		Level III		Total
Financial Assets:
Money market funds	$	11,661	$	-	$	-	$	11,661
Total financial assets	$	11,661	$	-	$	-	$	11,661

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Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

The following summarizes the Company’s property and equipment for each of the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Laboratory and office equipment	$	1,350	$	1,127
Manufacturing equipment		10,969		10,857
Computer equipment and software		340		314
Leasehold improvements		15,705		15,694
Construction in progress		2,182		1,961
		30,546		29,953
Less: accumulated depreciation		(26,306)		(24,498)
	$	4,240	$	5,455

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Debt Financing (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Summary of Long-Term Debt, Net of Unamortized Debt Discount and Issuance Costs

The following is a summary of the Company’s long-term debt, net of unamortized debt discount and issuance costs for the periods presented (in thousands):

	September 30, 2017		December 31, 2016
	(unaudited)
Principal amount	$	7,812	$	12,122
Less:     unamortized debt issuance costs		(16)		(41)
unamortized fair value of free standing warrant		(29)		(75)
Plus:     unamortized fair value debt premium		55		143
accrued terminal interest		303		310
accrued interest		52		83
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542
Secured promissory note, current portion		6,229		5,992
Secured promissory note, long-term portion		1,948		6,550
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$	8,177	$	12,542

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Payments under Non-Cancellable Related Party Operating Lease

As of September 30, 2017, future minimum payments under the Company’s non-cancelable related party operating lease for each year ending December 31 are as follows (unaudited; in thousands):

		Total
Remainder of 2017	$		326
2018			1,558
2019			1,754
2020			1,807
2021 and thereafter			7,085
	$		12,530

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Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Summary of Warrants Issued and Outstanding

Below is a table summarizing the warrants issued and outstanding for each of the periods presented (unaudited):

	Warrants Outstanding as of   As of December 31,   2016		Warrants         Exercised		Warrants         Expired		Warrants Outstanding     As of September 30,     2017		Exercise     Price		Expiration     Date
PIPE Financing - Series A		4,800,000		1,844,214		2,955,786		-	$	1.45		8/26/2017
PIPE Financing - Series B		4,800,000		881,825		-		3,918,175	$	1.55		8/19/2021
Hercules - June 2014		31,674		-		-		31,674	$	8.84		1/27/2020
Hercules - June 2015		40,705		-		-		40,705	$	7.37		6/23/2020
Total		9,672,379		2,726,039		2,955,786		3,990,554

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option and Award Activity Excluding Grants Outside of Existing Equity Compensation Plans

The following table summarizes option and award activity, excluding grants outside of the existing equity compensation plans, for the nine months ended September 30, 2017 (unaudited):

	Shares     Available       for Grant		Outstanding   Number of Shares		Weighted- Average Exercise   Price per   Share		Weighted- Average Remaining   Contractual     Term (In Years)	Aggregate   Intrinsic Value
Balance at December 31, 2016		55,815		1,594,058	$	1.93	8.45	$	18,900
Additional shares reserved		1,059,008		-	$	-
Options granted (1)		(903,000)		903,000	$	0.72
Options exercised		-		(98,583)	$	1.40
Options cancelled/forfeited/expired		590,644		(590,644)	$	1.93
Restricted stock awards granted		(60,000)		-	$	-
Restricted stock award forfeited		26,666		-
Shares expired under 2012 Plan		(4,836)		-	$	-
Balance at September 30, 2017		764,297		1,807,831	$	1.35	8.42	$	140,000
Exercisable at September 30, 2017				487,827	$	2.25	6.28	$	18,750
Vested or expected to vest at September 30, 2017				1,690,463	$	1.38	8.36	$	130,827

(1) Includes conditional grants of 580,000 awarded in November 2016 and subsequently approved by shareholders in May 2017.

Summary of Stock Options Outstanding and Exercisable

The following table summarizes the composition of stock options outstanding and exercisable under the 2012 Plan and the 2014 Plan, which excludes inducement grants, as of September 30, 2017 (unaudited):

	Options Outstanding						Options Exercisable
Exercise Price	Number of         Shares		Weighted- Average Remaining Contractual         Life (in  years)		Weighted         Average Exercise Price		Number of         Shares		Weighted         Average Exercise Price
$0.57 - $0.57		560,000		9.09	$	0.57		74,998	$	0.57
$0.85 - $0.85		383,500		9.22	$	0.85		-	$	-
$0.99 - $1.28		386,833		8.70	$	1.05		64,158	$	1.28
$1.40 - $2.57		413,197		6.70	$	2.27		304,554	$	2.22
$4.52 - $9.29		64,301		7.26	$	7.08		44,117	$	6.72

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense recognized for grants under the approved option plans and inducement grants, was as follows (unaudited; in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Research and development	$	61	$	76	$	198	$	351
General and administrative		85		154		364		545
	$	146	$	230	$	562	$	896

Schedule of Weighted-Average Assumptions for the Black-Scholes Option-Pricing Model Used in Determining the Fair Value of Options Granted to Employees

The following table illustrates the input assumptions used to value employee stock option grants for the periods presented (unaudited):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Dividend yield	0%	0%	0%	0%
Risk-free interest rate	1.94%	1.26%	1.90% - 2.13%	1.06% - 1.97%
Expected volatility	89%	89%	89%	89%
Expected term (years)	6.08	6.08	6.08	6.08

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Organization - Additional Information (Detail)	Sep. 30, 2017 Subsidiaries
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of wholly owned subsidiaries	1

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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Accumulated deficit	$ (218,385)	$ (196,769)

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Summary of Significant Accounting Policies - Schedule of Outstanding Common Stock Equivalents Excluded From Computations of Diluted Net Loss per Common Share (Detail) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock excluded from computation of diluted net loss per share	6,186	11,045
Warrants to Purchase Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock excluded from computation of diluted net loss per share	3,991	9,672
Options to Purchase Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock excluded from computation of diluted net loss per share	2,195	1,373

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Cash, Cash Equivalents and Investments - Summary of Cash, Cash Equivalents, and Marketable Security Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Classified as:
Cash and cash equivalents	$ 13,292	$ 15,003	$ 19,178	$ 6,646
Restricted cash	35	35
Short-term investments in marketable securities	6,557	0
Total	19,884	15,038
Cost	19,884	15,038
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	19,884	15,038
Cash in Bank [Member]
Classified as:
Total	10,836	3,342
Cost	10,836	3,342
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	10,836	3,342
Money Market Funds [Member]
Classified as:
Total	1,954	11,661
Cost	1,954	11,661
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	1,954	11,661
Certificates of Deposit (Restricted) [Member]
Classified as:
Total	35	35
Cost	35	35
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	35	$ 35
Certificates of Deposit [Member]
Classified as:
Total	3,404
Cost	3,404
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	3,404
Commercial Paper [Member]
Classified as:
Total	250
Cost	250
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	250
Corporate Notes and Bonds [Member]
Classified as:
Total	2,006
Cost	2,006
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	2,006
U.S Government Agency Bonds [Member]
Classified as:
Total	1,399
Cost	1,399
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 1,399

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Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial Assets:
Financial assets fair value	$ 9,013	$ 11,661
Money Market Funds [Member]
Financial Assets:
Financial assets fair value	1,954	11,661
Certificates of Deposit [Member]
Financial Assets:
Financial assets fair value	3,404
Commercial Paper [Member]
Financial Assets:
Financial assets fair value	250
Corporate Notes and Bonds [Member]
Financial Assets:
Financial assets fair value	2,006
U.S Government Agency Bonds [Member]
Financial Assets:
Financial assets fair value	1,399
Level I [Member]
Financial Assets:
Financial assets fair value	1,954	11,661
Level I [Member] | Money Market Funds [Member]
Financial Assets:
Financial assets fair value	1,954	11,661
Level I [Member] | Certificates of Deposit [Member]
Financial Assets:
Financial assets fair value	0
Level I [Member] | Commercial Paper [Member]
Financial Assets:
Financial assets fair value	0
Level I [Member] | Corporate Notes and Bonds [Member]
Financial Assets:
Financial assets fair value	0
Level I [Member] | U.S Government Agency Bonds [Member]
Financial Assets:
Financial assets fair value	0
Level II [Member]
Financial Assets:
Financial assets fair value	7,059	0
Level II [Member] | Money Market Funds [Member]
Financial Assets:
Financial assets fair value	0	0
Level II [Member] | Certificates of Deposit [Member]
Financial Assets:
Financial assets fair value	3,404
Level II [Member] | Commercial Paper [Member]
Financial Assets:
Financial assets fair value	250
Level II [Member] | Corporate Notes and Bonds [Member]
Financial Assets:
Financial assets fair value	2,006
Level II [Member] | U.S Government Agency Bonds [Member]
Financial Assets:
Financial assets fair value	1,399
Level III [Member]
Financial Assets:
Financial assets fair value	0	0
Level III [Member] | Money Market Funds [Member]
Financial Assets:
Financial assets fair value	0	$ 0
Level III [Member] | Certificates of Deposit [Member]
Financial Assets:
Financial assets fair value	0
Level III [Member] | Commercial Paper [Member]
Financial Assets:
Financial assets fair value	0
Level III [Member] | Corporate Notes and Bonds [Member]
Financial Assets:
Financial assets fair value	0
Level III [Member] | U.S Government Agency Bonds [Member]
Financial Assets:
Financial assets fair value	$ 0

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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 30,546	$ 29,953
Less: accumulated depreciation	(26,306)	(24,498)
Property and equipment, net	4,240	5,455
Laboratory and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,350	1,127
Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,969	10,857
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	340	314
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,705	15,694
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,182	$ 1,961

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Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 600	$ 600	$ 1,902	$ 1,866

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Debt Financing - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 01, 2017	Dec. 31, 2016	Jun. 30, 2014
Debt Instrument [Line Items]
Interest expense		$ 200,000	$ 300,000	$ 700,000	$ 1,000,000
Beneficial Owner [Member] | BMV Direct SOTRS LP [Member] | Minimum [Member]
Debt Instrument [Line Items]
Ownership percentage of related party	5.00%
Amended Hercules Secured Term Loan [Member]
Debt Instrument [Line Items]
Debt interest rate		7.95%		7.95%			7.95%
Senior Subordinated Notes [Member] | Senior Secured Term Loan with Hercules [Member]
Debt Instrument [Line Items]
Debt face amount								$ 4,000,000
Senior Subordinated Notes [Member] | Amended Hercules Secured Term Loan [Member]
Debt Instrument [Line Items]
Debt face amount	$ 15,000,000
Debt payment terms				Principal balance will be subject to a 12-month interest-only period beginning July 1, 2015, followed by equal monthly installment payments of principal and interest, with all outstanding amounts due and payable on December 1, 2018.
Debt payment, beginning date				Jul. 01, 2015
Debt payment, due and payable date				Dec. 01, 2018
Debt effective interest rate	7.95%
Debt variable interest rate	7.95%
Debt additional variable interest rate decrease	5.25%
Debt end of term charge						$ 100,000
Debt prepayment penalty description				The Company may prepay all, but not less than all, of the Hercules Term Loan with no prepayment charge if prepaid after June 23, 2017.
Additional debt end of term charge		$ 351,135		$ 351,135
Senior Subordinated Notes [Member] | Amended Hercules Secured Term Loan [Member] | After June 23, 2017 [Member]
Debt Instrument [Line Items]
Prepayment penalty charge on outstanding principal after lock-in period	$ 0
Convertible Subordinated Debt [Member] | BMR Secured Note [Member]
Debt Instrument [Line Items]
Prepayment of outstanding principal and all accrued interest	$ 11,400,000

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Debt Financing - Summary of Long-Term Debt, Net of Unamortized Debt Discount and Issuance Costs (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt
Principal amount	$ 7,812	$ 12,122
Less: unamortized debt issuance costs	(16)	(41)
unamortized fair value of free standing warrant	(29)	(75)
Plus: unamortized fair value debt premium	55	143
accrued terminal interest	303	310
accrued interest	52	83
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	8,177	12,542
Secured promissory note, current portion	6,229	5,992
Secured promissory note, long-term portion	1,948	6,550
Secured promissory note (including accrued interest), net of unamortized debt issuance cost and premium	$ 8,177	$ 12,542

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Commitments and Contingencies - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Jun. 06, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Commitments [Line Items]
Rental expense		$ 400,000	$ 200,000	$ 800,000	$ 500,000
Seventh Amendment to Lease Agreement [Member]
Other Commitments [Line Items]
Operating lease amendment description				Under the Seventh Amendment, the Company extended the term of the Lease for the Company’s headquarters in Fremont, California through August 31, 2024, with an option to further extend the lease for an additional 65 months, subject to certain terms and conditions. The Company has agreed to pay a monthly base rent of $136,191 for the period commencing September 1, 2017, and ending on August 31, 2018, with an increase on September 1, 2018, and annual increases on September 1 of each subsequent year until the lease year beginning September 1, 2023. The Seventh Amendment also provides for rent abatements, subject to certain conditions, totaling $275,552 and certain tenant improvements to be completed at the Landlord’s expense (not to exceed $975,000 or, under certain conditions, $1,100,000). The Company will incur additional expense of approximately $0.4 million under the lease in connection with roof repairs that will be treated as additional rent and paid over the term of the lease.
Extended lease term	65 months
Monthly base rent payable	$ 136,191
Rent abatements	275,552
Tenant improvements	975,000
Tenant improvements under certain conditions	1,100,000
Additional expense incurred under operating lease	$ 400,000

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Commitments and Contingencies - Schedule of Future Minimum Payments under Non-Cancellable Related Party Operating Lease (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating lease future minimum payments due, remainder of 2017	$ 326
Operating lease future minimum payments due, 2018	1,558
Operating lease future minimum payments due, 2019	1,754
Operating lease future minimum payments due, 2020	1,807
Operating lease future minimum payments due, 2021 and thereafter	7,085
Operating lease future minimum payments due	$ 12,530

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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended
	Mar. 22, 2017	Aug. 15, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Class of Stock [Line Items]
Common stock shares issued	19,550,000
Offering price per share	$ 1.50
Net proceeds from issuance of common stock			$ 26,623	$ 0
Equity warrants outstanding			3,990,554		9,672,379
Number of securities called by each warrant			1
Proceeds from exercise of warrants			$ 4,000
Common Stock [Member]
Class of Stock [Line Items]
Warrants to purchase common stock			2,726,039
Private Investment in Public Equity (PIPE) [Member]
Class of Stock [Line Items]
Common stock shares issued		4,800,000
Offering price per share		$ 1.32
Net proceeds from issuance of common stock		$ 6,300
Equity warrants outstanding		9,600,000
Proceeds from issuance of common stock and warrants		$ 7,500
Costs related to offering		$ 900
Warrant issuance price		$ 0.125
Proceeds from issuance of warrants		$ 1,200
Number of securities called by each warrant		1
Private Investment in Public Equity (PIPE) [Member] | Directors and Executive Officers [Member]
Class of Stock [Line Items]
Common stock shares issued		275,454
Equity warrants outstanding		550,908
Private Investment in Public Equity (PIPE) [Member] | Series A [Member]
Class of Stock [Line Items]
Equity warrants outstanding			0		4,800,000
Warrant exercise price			$ 1.45
Warrants expiration Date			Aug. 26, 2017
Private Investment in Public Equity (PIPE) [Member] | Series B [Member]
Class of Stock [Line Items]
Equity warrants outstanding			3,918,175		4,800,000
Warrant exercise price			$ 1.55
Warrants expiration Date			Aug. 19, 2021
Private Investment in Public Equity (PIPE) [Member] | Warrants to Purchase Common Stock [Member] | Series A [Member]
Class of Stock [Line Items]
Equity warrants outstanding		4,800,000
Warrant exercise price		$ 1.45
Private Investment in Public Equity (PIPE) [Member] | Warrants to Purchase Common Stock [Member] | Series B [Member]
Class of Stock [Line Items]
Equity warrants outstanding		4,800,000
Warrant exercise price		$ 1.55
Over-Allotment [Member]
Class of Stock [Line Items]
Common stock shares issued			2,550,000

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Stockholders' Equity - Summary of Warrants Issued and Outstanding (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Aug. 15, 2016
Class of Warrant or Right [Line Items]
Warrants Exercised	2,726,039
Warrants Expired	2,955,786
Warrants Outstanding	3,990,554	9,672,379
Hercules - June 2014 [Member]
Class of Warrant or Right [Line Items]
Warrants Exercised	0
Warrants Expired	0
Warrants Outstanding	31,674	31,674
Exercise Price	$ 8.84
Expiration Date	Jan. 27, 2020
Hercules - June 2015 [Member]
Class of Warrant or Right [Line Items]
Warrants Exercised	0
Warrants Expired	0
Warrants Outstanding	40,705	40,705
Exercise Price	$ 7.37
Expiration Date	Jun. 23, 2020
Private Investment in Public Equity (PIPE) [Member]
Class of Warrant or Right [Line Items]
Warrants Outstanding			9,600,000
Private Investment in Public Equity (PIPE) [Member] | Series A [Member]
Class of Warrant or Right [Line Items]
Warrants Exercised	1,844,214
Warrants Expired	2,955,786
Warrants Outstanding	0	4,800,000
Exercise Price	$ 1.45
Expiration Date	Aug. 26, 2017
Private Investment in Public Equity (PIPE) [Member] | Series B [Member]
Class of Warrant or Right [Line Items]
Warrants Exercised	881,825
Warrants Expired	0
Warrants Outstanding	3,918,175	4,800,000
Exercise Price	$ 1.55
Expiration Date	Aug. 19, 2021

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions						1 Months Ended	9 Months Ended
	Jun. 12, 2017	May 31, 2017	Jan. 19, 2017	Nov. 02, 2016	Sep. 07, 2016	Nov. 30, 2016	Sep. 30, 2017	Jun. 05, 2017	Mar. 22, 2017	Jan. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock number of shares granted						580,000	903,000
Common stock, exercise price per share									$ 1.50
Term of award							10 years
Vesting percentage							25.00%
Vesting term							The inducement grants have a term of 10 years and vest at the rate of 25% of the shares on the first anniversary of the commencement of such employee's employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date.
Vesting period							4 years
Unrecognized stock-based compensation expense							$ 1.2
Weighted-average period of unrecognized stock-based compensation expense							3 years 2 months 12 days
September 2016 and January 2017 Inducement Option Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance								287,000
Plan Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance								700,000
Evergreen Increase [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance								359,008
Chief Business Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock number of shares granted					252,000
Common stock, exercise price per share					$ 0.77
New Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock number of shares granted	100,000		35,000
Common stock, exercise price per share	$ 1.36		$ 1.14
Term of award	10 years
Vesting percentage	25.00%
Vesting term							Each stock option has a ten-year term and vests over four years with 25% of the shares vesting on the first anniversary of the commencement of such employee's employment with the Company and monthly thereafter, so that the option is fully vested on the fourth anniversary of the vesting start date.
Vesting period	4 years
Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock number of shares granted				670,000
Common stock, exercise price per share				$ 0.57
Former Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conditional grants forfeited upon termination				90,000
2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options or awards issued under the Plan							0
2014 Equity and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares							1,642,899
Options Outstanding and Exercisable, Exercise Price, Minimum							$ 0.57
Options Outstanding and Exercisable, Exercise Price, Maximum							9.29
Options Outstanding, Weighted Average Exercise Price							$ 1.30
Common stock reserved for future issuance										359,008
Amended and Restated 2014 Equity and Incentive Plan [Member] | Executive Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock number of shares granted		700,000

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Stock-Based Compensation - Summary of Stock Option and Award Activity Excluding Grants Outside of Existing Equity Compensation Plans (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Nov. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2016		$ 140,000	$ 18,900
Aggregate Intrinsic Value, Exercisable		18,750
Aggregate Intrinsic Value, Vested or expected to vest		$ 130,827
Shares Available for Grant, Beginning balance		55,815
Shares Available for Grant, Options reserved		1,059,008
Shares Available for Grant, Options granted	(580,000)	(903,000)
Shares Available for Grant, Options exercised		0
Shares Available for Grant, Options cancelled/forfeited/expired		590,644
Shares Available for Grant, Restricted stock award forfeited		26,666
Shares Available for Grant, Ending balance		764,297	55,815
Outstanding Number of Shares, Beginning balance		1,594,058
Outstanding Number of Shares, Options granted	580,000	903,000
Outstanding Number of Shares, Options exercised		(98,583)
Outstanding Number of Shares, Options cancelled/forfeited/expired		(590,644)
Outstanding Number of Shares, Restricted stock award forfeited		0
Outstanding Number of Shares, Ending balance		1,807,831	1,594,058
Outstanding Number of Shares, Exercisable		487,827
Outstanding Number of Shares, Restricted stock vested and released		1,690,463
Weighted-Average Exercise Price per Share, beginning balance		$ 1.93
Weighted-Average Exercise Price per Share, Options granted		0.72
Weighted-Average Exercise Price per Share, Options exercised		1.40
Weighted-Average Exercise Price per Share, Options cancelled/forfeited/expired		1.93
Weighted-Average Exercise Price per Share, Restricted stock awards granted		0
Weighted-Average Exercise Price per Share, Restricted stock awards forfeited		0
Weighted-Average Exercise Price per Share, Ending balance		1.35	$ 1.93
Weighted-Average Exercise Price per Share, Exercisable		2.25
Weighted-Average Exercise Price per Share, Vested or expected to vest		$ 1.38
Weighted-Average Remaining Contractual Term		8 years 5 months 1 day	8 years 5 months 12 days
Weighted-Average Remaining Contractual Term, Exercisable		6 years 3 months 11 days
Weighted-Average Remaining Contractual Term, Vested or expected to vest		8 years 4 months 9 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Restricted stock awards granted		(60,000)
Outstanding Number of Shares, Restricted stock award granted		0
2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Shares expired under 2012 Plan		(4,836)

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Stock-Based Compensation - Summary of Stock Option and Award Activity Excluding Grants Outside of Existing Equity Compensation Plans (Parenthetical) (Detail) - shares	1 Months Ended	9 Months Ended
	Nov. 30, 2016	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares Available for Grant, Options granted	580,000	903,000

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Stock-Based Compensation - Summary of Stock Options Outstanding and Exercisable (Detail) - 2012 and 2014 Plan Excluding Inducement Grants [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
$0.57 - $0.57 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Exercise Price, Minimum	$ 0.57
Options Outstanding, Exercise Price, Maximum	$ 0.57
Options Outstanding, Number of Shares | shares	560,000
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	9 years 1 month 2 days
Options Outstanding, Weighted Average Exercise Price	$ 0.57
Options Exercisable, Number of Shares | shares	74,998
Options Exercisable,Weighted Average Exercise Price	$ 0.57
$0.85 - $0.85 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Exercise Price, Minimum	0.85
Options Outstanding, Exercise Price, Maximum	$ 0.85
Options Outstanding, Number of Shares | shares	383,500
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	9 years 2 months 19 days
Options Outstanding, Weighted Average Exercise Price	$ 0.85
Options Exercisable, Number of Shares | shares	0
Options Exercisable,Weighted Average Exercise Price	$ 0.00
$0.99 - $1.28 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Exercise Price, Minimum	0.99
Options Outstanding, Exercise Price, Maximum	$ 1.28
Options Outstanding, Number of Shares | shares	386,833
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	8 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 1.05
Options Exercisable, Number of Shares | shares	64,158
Options Exercisable,Weighted Average Exercise Price	$ 1.28
$1.40 - $2.57 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Exercise Price, Minimum	1.40
Options Outstanding, Exercise Price, Maximum	$ 2.57
Options Outstanding, Number of Shares | shares	413,197
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	6 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 2.27
Options Exercisable, Number of Shares | shares	304,554
Options Exercisable,Weighted Average Exercise Price	$ 2.22
$4.52 - $9.29 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Exercise Price, Minimum	4.52
Options Outstanding, Exercise Price, Maximum	$ 9.29
Options Outstanding, Number of Shares | shares	64,301
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	7 years 3 months 4 days
Options Outstanding, Weighted Average Exercise Price	$ 7.08
Options Exercisable, Number of Shares | shares	44,117
Options Exercisable,Weighted Average Exercise Price	$ 6.72

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Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 146	$ 230	$ 562	$ 896
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	61	76	198	351
General and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 85	$ 154	$ 364	$ 545

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Stock-Based Compensation - Schedule of Weighted-Average Assumptions for the Black-Scholes Option-Pricing Model Used in Determining the Fair Value of Options Granted to Employees (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	0.00%	0.00%	0.00%	0.00%
Risk-free interest rate	1.94%	1.26%
Risk-free interest rate, minimum			1.90%	1.06%
Risk-free interest rate, maximum			2.13%	1.97%
Expected volatility	89.00%	89.00%	89.00%	89.00%
Expected term (years)	6 years 29 days	6 years 29 days	6 years 29 days	6 years 29 days

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Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions				9 Months Ended
	Oct. 20, 2017	Aug. 04, 2017	Mar. 22, 2017	Sep. 30, 2017
Subsequent Event [Line Items]
Common stock shares issued			19,550,000
Stock issuance period description				Over the 30-month period commencing on the date that a registration statement
Future sales of common stock period				30 months
Maximum [Member]
Subsequent Event [Line Items]
Percentage of number of shares that can be issued under purchase agreement		19.99%
Number of shares that can be issued under purchase agreement		7,800,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Additional shares issued under purchase agreement	0
Number of shares that can be purchased under purchase agreement	300,000
Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Value of common stock shares issued	$ 35.0
Common stock shares issued	227,500
Value of shares that can be purchased under purchase agreement	$ 1.0
Subsequent Event [Member] | Minimum [Member]
Subsequent Event [Line Items]
Closing price of common stock	$ 0.50
Subsequent Event [Member] | Initial Commitment [Member]
Subsequent Event [Line Items]
Common stock shares issued	227,500