Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 30,980,473	$ 24,613,638
Accounts receivable	7,218,367	4,489,317
Prepaid expenses and other current assets	1,055,816	267,623
Total current assets	39,254,656	29,370,578
Other assets
Property and equipment, net	243,039	0
Right of use assets - operating leases	768,441
Patents and patent applications, net	14,373	15,746
Total assets	40,280,509	29,386,324
Current liabilities
Accounts payable and accrued liabilities	1,316,773	1,132,960
License fees payable	0	5,400,000
Accrued salaries and wages	1,237,661	1,083,644
Royalty payable	1,620,182	998,305
Deferred revenue	918,272	1,212,149
Operating leases - current	516,931
Total current liabilities	5,609,819	9,827,058
Long-term liabilities
Operating leases - long term	254,664
License fees payable, net of current portion	0	2,700,000
Total liabilities	5,864,483	12,527,058
Stockholders' equity
Common stock; par value $0.001; 200,000,000 shares authorized; 4,186,438 and 3,845,361 shares issued and outstanding at December 31, 2019 and 2018, respectively.	4,187	3,846
Additional paid-in capital	97,239,455	91,276,086
Accumulated deficit	(62,827,616)	(74,420,666)
Total stockholders' equity	34,416,026	16,859,266
Total liabilities and stockholders' equity	$ 40,280,509	$ 29,386,324