CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 52,137,707	$ 71,421,601
Grants and accounts receivable, net of allowance for doubtful accounts of $60,539 and $46,851 at December 31, 2021 and 2020, respectively	4,523,430	5,159,275
Inventories	4,766,098	2,673,799
Prepaid expenses and other current assets	2,871,655	3,198,460
Total current assets	64,298,890	82,453,135
Property and equipment - net	5,150,886	2,119,927
Restricted cash	1,687,459	0
Right of use asset	13,423,472	1,029,123
Other assets	4,958,575	4,348,286
Total Assets	89,519,282	89,950,471
Current Liabilities:
Accounts payable	2,805,235	1,835,082
Accrued expenses and other current liabilities	10,314,341	7,870,687
Lease liability - current portion	570,566	447,485
Total current liabilities	13,690,142	10,153,254
Lease liability, net of current portion	13,250,943	581,638
Total liabilities	26,941,085	10,734,892
Commitments and Contingencies (Note 6)
Stockholders' Equity:
Preferred Stock, Par Value $0.001, 5,000,000 shares authorized; No shares issued and outstanding at December 31, 2021 and 2020	0	0
Common Stock, Par Value $0.001, 100,000,000 shares authorized; 43,478,487 and 43,221,999 shares issued and outstanding at December 31, 2021 and 2020, respectively	43,478	43,222
Additional paid-in capital	283,194,429	277,533,082
Accumulated other comprehensive income (loss)	525,585	(1,734,078)
Accumulated deficit	(221,185,295)	(196,626,647)
Total stockholders' equity	62,578,197	79,215,579
Total Liabilities and Stockholders' Equity	$ 89,519,282	$ 89,950,471