Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Product	$ 648,347	$ 75,139	$ 1,375,785	$ 445,146
Service	51,000	74,807	113,292	289,657
Other	91,204	184,429	325,789	426,095
Total revenue	790,551	334,375	1,814,866	1,160,898
Cost of revenue	834,949	615,523	1,729,575	1,257,934
Gross margin	(44,398)	(281,148)	85,291	(97,036)
Operating expenses:
Selling, general and administrative	3,726,490	2,429,388	7,165,759	4,506,190
Research and development	953,222	865,540	1,641,437	1,723,023
Total operating expenses	4,679,712	3,294,928	8,807,196	6,229,213
Operating loss	(4,724,110)	(3,576,076)	(8,721,905)	(6,326,249)
Other income (expense):
Loss from change in stock warrant valuation	(628,643)	(56,322)	(239,683)	(56,322)
Interest expense	(476,071)	(56,436)	(955,448)	(130,949)
Interest income	11,065		11,142
Loss on settlement of convertible debt	(705,217)		(705,217)
Other	70,634	4,008	70,634	1,104
Net loss before income taxes	(6,452,342)	(3,684,826)	(10,540,477)	(6,512,416)
Net loss	(6,452,342)	(3,684,826)	(10,540,477)	(6,512,416)
Accretion of stock issuance costs	(10,969)	(186,206)	(35,046)	(208,687)
Accretion of Series D and E redeemable convertible preferred stock dividends	(367,350)	(828,125)	(1,165,932)	(1,568,762)
Net loss attributable to common stockholders	$ (6,870,807)	$ (4,784,874)	$ (11,869,071)	$ (8,426,959)
Net loss per share attributable to common stockholders, basic and diluted	$ (1.73)	$ (49.62)	$ (5.49)	$ (87.39)
Shares used in computing net loss per share attributable to common stockholders, basic and diluted	3,973,055	96,440	2,163,295	96,426
Series E Warrants
Other income (expense):
Accretion of Series E warrant discount	$ (40,146)	$ (85,717)	$ (127,616)	$ (137,094)