Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net loss	$ (3,210,225)	$ (2,302,660)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	183,893	168,727
Stock-based compensation expense	402,763	158,371
Write-off of deferred financing costs	86,736	0
Amortization of deferred rent related to lease incentives	(63,499)	(63,500)
Amortization of debt discount	31,199	0
Accretion and amortization on available for sale investments	1,792	65,485
(Increase) Decrease in
Accounts receivable, trade	(354,726)	92,236
Inventories	(76,094)	(356,033)
Prepaid expenses and other current assets	(50,151)	47,762
Increase (Decrease) in
Accounts payable	207,369	(99,771)
Accrued compensation and other current liabilities	37,527	(267,229)
Accrued interest, related party	8,333	0
Deferred rent	19,929	21,651
Net cash used in operating activities	(2,775,154)	(2,534,961)
Cash flows from investing activities
Sales of available-for-sale investments	1,650,000	4,725,000
Purchases of available-for-sale investments	0	(342,872)
Costs associated with internal use software development	(695,044)	(497,480)
Purchase of property and equipment	(99,353)	(72,009)
Net provided by investing activities	855,603	3,812,639
Cash flows from financing activities
Proceeds from related party debt	1,000,000	0
Proceeds from exercise of common stock options	151,498	79,969
Deferred costs related to potential stock issuance	(86,736)	0
Net cash provided by financing activities	1,064,762	79,969
Net increase (decrease) in cash and cash equivalents	(854,789)	1,357,647
Cash and cash equivalents - beginning of period	2,173,258	2,538,758
Cash and cash equivalents - end of period	1,318,469	3,896,405
Non-cash investing and financing activities
Costs incurred for capitalized internal use software not paid as of quarter end (amounts are included in liabilities)	42,760	265,380
Debt discount related to warrants	$ 374,390	$ 0