Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 2,050,507	$ 1,166,252
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	31,778	55,444
Stock-based compensation	44,093	341,026
Inventory Write-down	700,000	0
Changes in operating assets and liabilities:
Accounts receivable	110,605	814,108
Inventories	(182,404)	283,909
Prepaid expenses and other current and long-term assets	(101,579)	343,177
Accounts payable	(740,223)	(369,665)
Accrued expenses and compensation	657,059	(868)
Increase (Decrease) in Accrued Product Returns	(374,766)	(553,439)
Increase (Decrease) in Contract with Customer, Liability	(1,774,704)	0
Net Cash Provided by (Used in) Operating Activities	420,366	2,079,944
Cash flows from investing activities:
Purchases of fixed assets	0	(25,833)
Net Cash Provided by (Used in) Investing Activities	0	(25,833)
Cash flows from financing activities:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	420,366	2,054,111
Cash and cash equivalents, end of period	7,200,795
Supplemental disclosure of cash flow information:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 7,200,795	$ 6,097,792