Condensed Balance Sheets - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 10,215,809	$ 749,517
Accounts receivable, net	214,043	503,983
Inventory, net	347,463	369,742
Prepaid expenses and other current assets	490,201	90,233
Total current assets	11,267,516	1,713,475
Property and equipment, net	483,147	587,956
Deferred IPO issuance costs	0	296,041
Other noncurrent assets	46,380	57,459
Total assets	11,797,043	2,654,931
Current liabilities
Accounts payable	1,115,859	1,160,081
Accrued compensation and benefits	702,692	423,099
Accrued liabilities	583,851	993,657
Deferred revenue	234,508	339,171
Short term notes payable	2,500	1,505,000
Current maturities of long-term capital lease obligation	118,579	100,499
Short-term convertible notes, net of discounts	0	1,500,000
Total current liabilities	2,757,989	6,021,507
Long-term capital lease obligations and other noncurrent liabilities	210,758	134,149
Total liabilities	$ 2,968,747	$ 6,155,656
Commitments and contingencies (Note 10)
Redeemable convertible preferred stock
Total redeemable convertible preferred stock	$ 0	$ 4,564,899
Stockholders' equtiy (deficit)
Common stock, $.01 par value; 200,000,000 shares authorized; 10,719,272 and 493,178 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	107,193	4,932
Additional paid-in capital	113,447,153	88,701,737
Accumulated deficit	(104,726,050)	(96,772,293)
Total stockholders' equity (deficit)	8,828,296	(8,065,624)
Total liabilities, redeemable preferred stock and stockholders' equity (deficit)	11,797,043	2,654,931
Series A Convertible Redeemable Preferred Stock
Redeemable convertible preferred stock
Total redeemable convertible preferred stock	$ 0	$ 4,564,899