CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 26,389,021	$ 12,232,418
Grants and accounts receivable, net of allowance for doubtful accounts of $149,841 at March 31, 2020 and $145,313 at December 31, 2019	5,395,510	4,467,087
Inventories	1,967,174	2,113,897
Prepaid expenses and other current assets	3,777,526	2,088,127
Total current assets	37,529,231	20,901,529
Property and equipment, net	1,993,911	1,925,325
Right of use asset	970,182	1,070,762
Other assets	3,733,172	3,484,894
Total Assets	44,226,496	27,382,510
Current Liabilities:
Accounts payable	1,770,440	2,039,222
Current maturities of long-term debt	4,166,667	1,666,666
Lease liability - current portion	442,865	428,083
Accrued expenses and other current liabilities	5,084,308	5,802,296
Total current liabilities	11,464,280	9,936,267
Long term debt, net of current maturities and debt issuance costs	10,921,389	13,385,522
Lease liability, net of current portion	527,317	642,679
Total Liabilities	22,912,986	23,964,468
Commitments and Contingencies (Note 6)
Stockholders' Equity:
Preferred Stock, Par Value $0.001, 5,000,000 shares authorized; -0- shares issued and outstanding at March 31, 2020 and December 31, 2019	0	0
Common Stock, Par Value $0.001, 100,000,000 shares authorized; 36,130,355 and 32,616,107 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	36,130	32,616
Additional paid-in capital	212,383,812	191,648,907
Accumulated other comprehensive income	1,135,806	525,978
Accumulated deficit	(192,242,238)	(188,789,459)
Total Stockholders' Equity	21,313,510	3,418,042
Total Liabilities and Stockholders' Equity	$ 44,226,496	$ 27,382,510