Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 3,293,983	$ 3,613,392
Short-term investments available-for-sale, at fair value	28,201,507
Accounts receivable, net	716,246	801,125
Inventory, net of allowance of $284,319 and $54,269 at December 31, 2015 and 2014	2,201,301	1,685,814
Prepaid insurance	234,777	20,905
Prepaid expenses and other	210,440	91,130
Total current assets	34,858,254	6,212,366
Long-term investments available-for-sale, at fair value	2,603,901
Deferred financing and offering costs	52,377	1,369,281
Property and equipment, net	1,932,213	1,146,599
Total assets	39,446,745	8,728,246
Current liabilities:
Accounts payable	724,805	948,429
Accrued liabilities	1,944,511	1,499,750
Deferred revenue	47,476	41,248
NuvoGen obligation	543,750
Term loan	3,059,068	813,715
Total current liabilities	6,319,610	3,303,142
Redeemable convertible preferred stock warrant liability		730,543
Term loan payable - non-current, net of discount	7,789,963	9,705,655
NuvoGen obligation - non-current, net of discount	8,415,122	8,677,859
Other	28,652	58,380
Total liabilities	$ 22,553,347	22,475,579
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		$ 55,922,593
Commitments and Contingencies
Stockholders’ equity (deficit):
Preferred stock, $0.001 par value; 10,000,000 and 0 authorized at December 31, 2015 and 2014, respectively; no shares issued and outstanding at either date.
Common stock, $0.001 par value; 200,000,000 and 600,000,000 shares authorized at December 31, 2015 and 2014, respectively; 6,845,638 and 6,844,242 shares issued and outstanding, respectively, at December 31, 2015, 334,003 and 332,607 shares issued and outstanding, respectively, at December 31, 2014	$ 6,844	$ 333
Additional paid-in-capital (distributions in excess of capital)	106,569,405	(1,426,556)
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated other comprehensive loss	(41,357)
Accumulated deficit	(89,566,494)	(68,168,703)
Total stockholders’ equity (deficit)	16,893,398	(69,669,926)
Total liabilities and stockholders' equity (deficit)	$ 39,446,745	8,728,246
Series A Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		1,402,687
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		1,402,687
Series B Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		2,099,310
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		2,099,310
Series C-1 Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		4,567,525
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		4,567,525
Series C-2 Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		2,223,506
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		2,223,506
Series D Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		37,174,666
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		37,174,666
Series E Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock		8,454,899
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)		$ 8,454,899