Condensed Balance Sheets - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 7,510,493	$ 3,293,983
Short-term investments available-for-sale, at fair value	15,405,414	28,201,507
Accounts receivable	1,911,394	716,246
Inventory, net of allowance of $375,861 at June 30, 2016 and $284,319 at December 31, 2015	2,213,108	2,201,301
Prepaid insurance	236,126	234,777
Prepaid royalties	181,250
Prepaid expenses and other	256,564	210,440
Total current assets	27,714,349	34,858,254
Long-term investments available-for-sale, at fair value		2,603,901
Property and equipment, net	3,957,952	1,932,213
Total assets	31,672,301	39,394,368
Current liabilities:
Accounts payable	1,607,044	724,805
Accrued liabilities	1,639,534	1,915,268
Deferred revenue	183,707	47,476
NuvoGen obligation	762,500	543,750
Term loan	6,122,450	3,059,068
Other current liabilities	264,578	29,243
Total current liabilities	10,579,813	6,319,610
Term loan payable - non-current, net of discount and debt issuance costs	8,368,215	7,737,586
NuvoGen obligation - non-current, net of discount	8,119,589	8,415,122
Other	587,034	28,652
Total liabilities	27,654,651	22,500,970
Commitments and Contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 200,000,000 shares authorized at June 30, 2016 and December 31, 2015, 7,052,353 and 7,050,957 shares issued and outstanding, respectively, at June 30, 2016, 6,845,638 and 6,844,242 shares issued and outstanding, respectively, at December 31, 2015	7,051	6,844
Additional paid-in-capital	107,527,604	106,569,405
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated other comprehensive income (loss)	2,516	(41,357)
Accumulated deficit	(103,444,521)	(89,566,494)
Total stockholders’ equity	4,017,650	16,893,398
Total liabilities and stockholders' equity	$ 31,672,301	$ 39,394,368