Condensed Balance Sheets - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 5,523,824	$ 3,293,983
Short-term investments available-for-sale, at fair value	11,097,140	28,201,507
Accounts receivable	591,861	716,246
Inventory, net of allowance of $667,553 at September 30, 2016 and $284,319 at December 31, 2015	1,867,685	2,201,301
Prepaid insurance	215,236	234,777
Prepaid expenses and other	226,070	210,440
Total current assets	19,521,816	34,858,254
Long-term investments available-for-sale, at fair value		2,603,901
Property and equipment, net	3,666,947	1,932,213
Total assets	23,188,763	39,394,368
Current liabilities:
Accounts payable	1,117,830	724,805
Accrued liabilities	1,292,285	1,915,268
Deferred revenue	283,663	47,476
NuvoGen obligation	582,614	543,750
Term loan	6,254,688	3,059,068
Other current liabilities	270,041	29,243
Total current liabilities	9,801,121	6,319,610
Term loan payable - non-current, net of discount and debt issuance costs	6,902,379	7,737,586
NuvoGen obligation - non-current, net of discount	8,169,861	8,415,122
Other	530,159	28,652
Total liabilities	25,403,520	22,500,970
Commitments and Contingencies
Stockholders’ equity (deficit):
Common stock, $0.001 par value; 200,000,000 shares authorized at September 30, 2016 and December 31, 2015, 7,060,269 and 7,058,873 shares issued and outstanding, respectively, at September 30, 2016, 6,845,638 and 6,844,242 shares issued and outstanding, respectively, at December 31, 2015	7,059	6,844
Additional paid-in-capital	107,786,467	106,569,405
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated other comprehensive loss	(320)	(41,357)
Accumulated deficit	(109,932,963)	(89,566,494)
Total stockholders’ equity (deficit)	(2,214,757)	16,893,398
Total liabilities and stockholders' equity (deficit)	$ 23,188,763	$ 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.