Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 35,449,563	$ 48,251,336
Marketable Securities	12,598,400	0
Accounts receivable	5,609,021	8,910,975
Prepaid and other current assets	2,446,768	1,936,842
Total current assets	56,103,752	59,099,153
Other assets
Marketable Securities	2,500,675	0
Property and equipment - net	140,061	171,190
Right of use assets - operating leases	146,145	278,455
Patents and patent applications - net	12,657	13,000
Other non-current assets	0	1,051,234
Total assets	58,903,290	60,613,032
Current liabilities
Accounts payable and accrued expenses	3,680,244	2,966,479
Accrued salaries and wages	480,929	908,516
Royalty payable	979,489	1,908,072
Deferred revenue	859,315	354,756
Operating leases	148,623	282,421
Total current liabilities	6,148,600	6,420,244
Long-term liabilities
License Fee Payable, Noncurrent	18,768,938	18,700,546
Total long-term liabilities	18,768,938	18,700,546
Total liabilities	24,917,538	25,120,790
Stockholders' equity
Common stock; par value $0.001; 200,000,000 shares authorized; 4,330,594 and 4,258,105 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	4,331	4,259
Additional paid-in capital	101,529,146	100,203,979
Accumulated other comprehensive loss	(14,430)	(26,931)
Accumulated deficit	(67,533,295)	(64,689,065)
Total stockholders' equity	33,985,752	35,492,242
Total liabilities and stockholders' equity	$ 58,903,290	$ 60,613,032