Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net loss	$ (1,532,397)	$ (1,971,531)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation	26,817	30,119
Non-cash lease expense	582,712	585,586
Share-based compensation	1,370,557	722,312
Changes in operating assets and liabilities:
Accounts receivable	(3,775,626)	714,499
Inventories	(240,843)	(1,322,610)
Prepaid expenses and other current assets	41,460	80,419
Compensating cash arrangement	(299)
Other assets	23,569	(74,054)
Accounts payable	661,796	(96,800)
Accrued liabilities	(630,937)	(378,907)
Deferred revenue	3,684,883	130,691
Operating lease liability	(595,723)	(585,489)
Other liabilities	78,865
Net cash used in operating activities	(305,166)	(2,165,765)
Cash flows from investing activities
Purchase of equipment	(34,192)
Net cash used in investing activities	(34,192)
Cash flows from financing activities
Proceeds from issuance of stock, net of issuance costs	281,890	8,373
Net cash provided by financing activities	281,890	8,373
Net decrease in cash and cash equivalents	(57,468)	(2,157,392)
Cash and cash equivalents at beginning of period	43,939,512	30,182,115
Cash and cash equivalents at end of period	43,882,044	28,024,723
Reconciliation of cash, cash equivalents, and restricted cash to balance sheet as of March 31st:
Cash and cash equivalents	42,452,713	28,024,723
Restricted cash - current	1,336,000
Restricted cash	$ 93,331