Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 116,756	$ (5,887,410)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation	513,029	554,361
Amortization of intangibles	65,988	199,321
Amortization of deferred finance costs	24,657	99,998
Share-based compensation	560,973	768,682
Loss on asset disposal	94,931	98,550
Adjustment of warrants	(2,590,361)	(212,030)
Provisions for obsolete inventory	320,447	3,948,726
Changes in operating assets and liabilities:
Accounts receivable	(733,856)	378,704
Inventories	(365,142)	285,406
Prepaid expenses and other current assets	(124,419)	105,215
Other assets	26,775	(5,191)
Accounts payable	72,259	(968,909)
Accrued liabilities	(552,766)	(1,295,917)
Deferred revenue	(81,945)	(2,959,033)
Other liabilities	106,092	214,960
Net cash used in operating activities	(2,546,582)	(4,674,567)
Cash flows from investing activities
Purchase of fixed assets	(265,482)	(81,577)
Net cash used in investing activities	(265,482)	(81,577)
Cash flows from financing activities
Payments of deferred financing costs		(100,000)
Proceeds from issuance of stock, net of issuance costs	57,137	41,054
Proceeds from warrant exercise	9,864,697
Net cash provided by (used in) financing activities	9,921,834	(58,946)
Net increase (decrease) in cash and cash equivalents	7,109,770	(4,815,090)
Cash and cash equivalents at beginning of period	3,686,302	8,501,392
Cash and cash equivalents at end of period	10,796,072	3,686,302
Supplemental disclosures of cash flow information:
Interest paid