Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 3,482	$ (870,290)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation	77,823	89,549
Stock-based compensation expense	373,425	329,895
Amortization of deferred rent related to lease incentives	(31,749)	(31,750)
Amortization of debt discount		93,598
Loss from equity-method investment in SAVSU	143,756	229,368
Change in operating assets and liabilities
Accounts receivable, trade	(22,500)	132,873
Inventories	10,080	(54,388)
Prepaid expenses and other current assets	11,598	(138,029)
Accounts payable	(68,743)	(11,970)
Accrued compensation and other current liabilities	(102,643)	41,447
Accrued interest, related party		83,333
Deferred rent	(2,940)	(62,984)
Net cash provided by (used in) operating activities	391,589	(169,348)
Cash flows from investing activities
Purchase of property and equipment	(40,834)	(37,152)
Net cash used in investing activities	(40,834)	(37,152)
Cash flows from financing activities
Proceeds from note payable		1,000,000
Payments on equipment loan	(1,635)
Payments on capital lease obligation	(3,271)
Proceeds from exercise of common stock options and warrants	129,596	120,000
Payments of preferred stock dividends	(106,250)
Deferred costs related to security issuance		(29,400)
Net cash provided by financing activities	18,440	1,090,600
Net increase in cash and cash equivalents	369,195	884,100
Cash and cash equivalents - beginning of period	6,663,318	1,405,826
Cash and cash equivalents - end of period	7,032,513	2,289,926
Non-cash financing activity
Stock issued for services provided in prior period included in liabilities at year-end	35,625	35,624
Purchase of equipment with debt	17,604
Series A preferred stock dividends accrued not yet paid	106,250
Deferred costs related to security issuance not yet paid as of quarter end		$ 7,856