Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss)	$ (2,122,820)	$ 1,435,229
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation	24,912	140,465
Amortization of intangibles		16,497
Amortization of deferred finance costs		24,657
Amortization of right-of-use asset	567,857
Share-based compensation	147,923	216,586
Adjustment of warrants		(2,590,361)
Changes in operating assets and liabilities:
Accounts receivable	(218,359)	(2,350,333)
Inventories	(117,468)	(299,603)
Prepaid expenses and other current assets	189,686	97,206
Other assets	41,194	(57,059)
Accounts payable	656,870	165,322
Accrued liabilities	(368,794)	(247,570)
Deferred revenue	(182,265)	1,382,082
Operating lease liability	(567,857)
Other liabilities	172,180	45,497
Net cash used in operating activities	(1,776,941)	(2,021,385)
Cash flows from investing activities
Purchase of fixed assets	(9,833)	(9,990)
Net cash used in investing activities	(9,833)	(9,990)
Cash flows from financing activities
Proceeds from issuance of stock, net of issuance costs	31,518	13,622
Proceeds from warrant exercise		9,945,164
Net cash provided by financing activities	31,518	9,958,786
Net increase (decrease) in cash and cash equivalents	(1,755,256)	7,927,411
Cash and cash equivalents at beginning of period	10,796,072	3,686,302
Cash and cash equivalents at end of period	$ 9,040,816	$ 11,613,713