Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows From Operating Activities:
Net loss	$ (18,331,479)	$ (9,555,601)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,415,222	857,939
Amortization of debt discount and deferred financing costs	288,420	0
Interest expense on convertible note settled by issuance of common stock	417,500	0
Unrealized loss on short-term equity securities	101,674	16,233
Realized gain on Treasury notes and bills	(81,673)	0
Stock-based compensation expense	6,961,622	5,478,625
Accelerated stock-based compensation expense	9,561,884	0
Warrant inducement and repricing expense	0	899,410
Property and equipment disposal costs	274,439	397,467
Provision for bad debt	42,085	40,215
Changes in operating assets and liabilities:
Accounts receivable	(3,596,610)	(1,958,405)
Inventories	(253,447)	(105,718)
Prepaid expenses and other current assets	(344,586)	(235,825)
Deposits	(86,462)	12,576
Change in operating lease right-of-use assets and lease liabilities	(6,300)	0
Accounts payable and other accrued expenses	570,477	405,074
Accrued compensation and related expenses	641,242	336,736
Deferred revenue	81,197	(7,129)
Deferred tax liability	20,935	0
Accrued interest	0	66,023
Net cash used in operating activities	(1,323,860)	(3,352,380)
Cash Flows From Investing Activities:
Purchases of property and equipment	(5,335,841)	(2,914,029)
Purchases of short-term investments	(43,195,959)	(9,923,619)
Maturities of short-term investments	5,995,000	0
Patent and trademark costs	(73,608)	(46,574)
Cash paid for acquisition	(20,316,707)	0
Net cash used in investing activities	(62,927,115)	(12,884,222)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options and warrants	5,362,742	6,020,919
Proceeds from public offering, net of offering costs	68,810,718	0
Repayment of finance lease liabilities	(23,191)	(14,700)
Proceeds from issuance of convertible debt	0	15,000,000
Proceeds from issuance of common stock, net of costs	0	9,808,330
Proceeds from tender offer, net of offering costs	0	4,641,807
Proceeds from ATM, net of offering costs	0	3,363,156
Payment of deferred financing costs	0	(288,420)
Net cash provided by financing activities	74,150,269	38,531,092
Effect of exchange rates on cash and cash equivalents	8,351	(9,554)
Net change in cash and cash equivalents	9,907,645	22,284,936
Cash and cash equivalents - beginning of period	37,327,125	15,042,189
Cash and cash equivalents - end of period	47,234,770	37,327,125
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	707,150	637
Cash paid for income taxes	13,888	19,954
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Net unrealized gain on available-for-sale debt securities	(27,952)	23,582
Reclassification of realized gain on available-for-sale debt securities to earnings	23,188	0
Fixed assets included in accounts payable and accrued liabilities	260,641	0
Purchase of equipment through capital lease obligations	0	71,047
Leasehold improvements paid by tenant allowance	0	127,316
Common stock issued for conversion of debt and accrued interest	$ 15,417,500	$ 0