Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 7,507,659	$ 3,293,983
Short-term investments available-for-sale, at fair value	4,304,901	28,201,507
Accounts receivable	1,377,441	716,246
Inventory, net of allowance of $270,307 at December 31, 2016 and $284,319 at December 31, 2015	1,511,053	2,201,301
Prepaid expenses and other	433,328	445,217
Total current assets	15,134,382	34,858,254
Long-term investments available-for-sale, at fair value		2,603,901
Deferred offering costs	49,630
Property and equipment, net	3,270,197	1,932,213
Total assets	18,454,209	39,394,368
Current liabilities:
Accounts payable	761,663	724,805
Accrued liabilities	1,670,286	1,915,268
Deferred revenue, current portion	335,659	47,476
NuvoGen obligation	604,751	543,750
Term loan	6,389,782	3,059,068
Other current liabilities	258,850	29,243
Total current liabilities	10,020,991	6,319,610
Term loan payable - non-current, net of discount and debt issuance costs	5,389,137	7,737,586
NuvoGen obligation - non-current, net of discount	8,017,356	8,415,122
Other	619,587	28,652
Total liabilities	24,047,071	22,500,970
Commitments and Contingencies
Stockholders’ equity (deficit):
Common stock, $0.001 par value; 200,000,000 shares authorized at December 31, 2016, and December 31, 2015, 7,939,967 and 7,938,571 shares issued and outstanding, respectively, at December 31, 2016, 6,845,638 and 6,844,242 shares issued and outstanding, respectively, at December 31, 2015	7,938	6,844
Additional paid-in-capital	110,081,334	106,569,405
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated other comprehensive loss	(1,090)	(41,357)
Accumulated deficit	(115,606,044)	(89,566,494)
Total stockholders’ equity (deficit)	(5,592,862)	16,893,398
Total liabilities and stockholders' equity (deficit)	$ 18,454,209	$ 39,394,368

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.