Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net loss	$ (870,290)	$ (1,490,513)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	89,549	91,791
Stock-based compensation expense	329,895	146,527
Amortization of deferred rent related to lease incentives	(31,750)	(31,749)
Amortization debt discount	93,598	0
Accretion and amortization on available for sale investments	0	1,792
Loss from equity-method investment in SAVSU	229,368	0
(Increase) Decrease in
Accounts receivable, trade	132,873	(260,971)
Inventories	(54,388)	(183,620)
Prepaid expenses and other current assets	(138,029)	17,324
Increase (Decrease) in
Accounts payable	(11,970)	91,907
Accrued compensation and other current liabilities	41,447	10,694
Accrued interest, related party	83,333	0
Deferred rent	(62,984)	13,335
Net cash used in operating activities	(169,348)	(1,593,483)
Cash flows from investing activities
Sales of available-for-sale investments	0	1,650,000
Costs associated with internal use software development	0	(552,535)
Purchase of property and equipment	(37,152)	(26,936)
Net cash provided by (used in) investing activities	(37,152)	1,070,529
Cash flows from financing activities
Proceeds from note payable	1,000,000	0
Proceeds from exercise of common stock options	120,000	32,223
Deferred costs related to security issuance	(29,400)	(20,096)
Net cash provided by financing activities	1,090,600	12,127
Net increase (decrease) in cash and cash equivalents	884,100	(510,827)
Cash and cash equivalents - beginning of period	1,405,826	2,173,258
Cash and cash equivalents - end of period	2,289,926	1,662,431
Non-cash financing activity
Option exercises for which cash not yet received as of quarter end	0	13,989
Stock Issued for Services provided in prior period included in liabilities at year-end	35,624	0
Deferred costs related to security issuance not yet paid as of quarter end	$ 7,856	$ 66,640