Condensed Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Product	$ 541,144	$ 600,190
Service	830,025	265,042
Total revenue	1,371,169	865,232
Cost of revenue	1,295,302	843,470
Gross margin	75,867	21,762
Operating expenses:
Selling, general and administrative	4,238,467	4,693,708
Research and development	1,267,063	1,994,101
Total operating expenses	5,505,530	6,687,809
Operating loss	(5,429,663)	(6,666,047)
Other income (expense):
Interest expense	(398,420)	(392,457)
Interest income	12,089	35,479
Total other income (expense)	(386,331)	(356,978)
Net loss before income taxes	(5,815,994)	(7,023,025)
Provision for income taxes	280	3,399
Net loss	$ (5,816,274)	$ (7,026,424)
Net loss per share, basic and diluted	$ (0.73)	$ (1.02)
Shares used in computing net loss per share, basic and diluted	7,971,097	6,885,522