Condensed Balance Sheets - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 4,922,696	$ 3,293,983
Short-term investments available-for-sale, at fair value	25,231,370	28,201,507
Accounts receivable, net	574,566	716,246
Inventory, net of allowance of $302,556 at March 31, 2016 and $284,319 at December 31, 2015	2,365,962	2,201,301
Prepaid insurance	61,008	234,777
Prepaid expenses and other	264,671	210,440
Total current assets	33,420,273	34,858,254
Long-term investments available-for-sale, at fair value	2,620,676	2,603,901
Property and equipment, net	3,712,294	1,932,213
Total assets	39,753,243	39,394,368
Current liabilities:
Accounts payable	2,231,788	724,805
Accrued liabilities	1,250,849	1,915,268
Deferred revenue	25,448	47,476
NuvoGen obligation	743,750	543,750
Term loan	5,993,009	3,059,068
Other current liabilities	234,044	29,243
Total current liabilities	10,478,888	6,319,610
Term loan payable - non-current, net of discount and debt issuance costs	9,784,163	7,737,586
NuvoGen obligation - non-current, net of discount	8,267,204	8,415,122
Other	659,245	28,652
Total liabilities	$ 29,189,500	$ 22,500,970
Commitments and Contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 200,000,000 shares authorized at March 31, 2016 and December 31, 2015, 7,006,317 and 7,004,921 shares issued and outstanding, respectively, at March 31, 2016, 6,845,638 and 6,844,242 shares issued and outstanding, respectively, at December 31, 2015	$ 7,005	$ 6,844
Additional paid-in-capital	107,226,662	106,569,405
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated other comprehensive loss	(2,006)	(41,357)
Accumulated deficit	(96,592,918)	(89,566,494)
Total stockholders’ equity	10,563,743	16,893,398
Total liabilities and stockholders' equity	$ 39,753,243	$ 39,394,368