Condensed Balance Sheets - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 11,171,021	$ 3,613,392
Short-term investments available-for-sale, at fair value	18,456,590
Accounts receivable, net	554,181	801,125
Inventory, net allowance of $265,150 at June 30, 2015 and $54,269 at December 31, 2014	2,412,093	1,685,814
Prepaid insurance	531,735	20,905
Prepaid expenses and other	236,000	91,130
Total current assets	33,361,620	6,212,366
Long-term investments available-for-sale, at fair value	14,412,979
Deferred financing and offering costs	64,105	1,369,281
Property and equipment:
Office equipment	434,729	414,424
Leasehold improvements	242,436	234,602
Laboratory and manufacturing equipment	2,682,093	2,009,818
Field equipment	164,755	286,044
Software	140,248	140,248
Property and equipment, gross	3,664,261	3,085,136
Less accumulated depreciation and amortization	(2,190,778)	(1,938,537)
Property and equipment, net	1,473,483	1,146,599
Total assets	49,312,187	8,728,246
Current liabilities:
Accounts payable	1,192,786	948,429
Accrued liabilities	1,036,974	1,499,750
Deferred revenue	28,753	41,248
NuvoGen obligation	181,250
Term loan	998,175	813,715
Total current liabilities	3,437,938	3,303,142
Redeemable convertible preferred stock warrant liability		730,543
Term loan payable - non-current, net of discount	9,669,319	9,705,655
NuvoGen obligation - non-current, net of discount	8,674,360	8,677,859
Other	43,757	58,380
Total liabilities	$ 21,825,374	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 June 30, 2015 and December 31, 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 June 30, 2015 and December 31, 2014, respectively; 6,828,810 and 6,827,414 shares issued and outstanding, respectively, at June 30, 2015, 334,003 and 332,607 shares issued and outstanding, respectively, at December 31, 2014	$ 6,827	$ 333
Additional paid-in-capital (distributions in excess of capital)	106,264,166	(1,426,556)
Treasury stock – 1,396 shares, at cost	(75,000)	(75,000)
Accumulated deficit	(78,709,180)	(68,168,703)
Total stockholders' equity (deficit)	27,486,813	(69,669,926)
Total liabilities and stockholders' equity (deficit)	$ 49,312,187	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