Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 30,502,390	$ 30,980,473
Accounts receivable	6,286,285	7,218,367
Prepaid and other current assets	1,892,856	1,055,816
Total current assets	38,681,531	39,254,656
Other assets
Property and equipment - net of accumulated depreciation	233,448	243,039
Right of use assets - operating leases	508,120	768,441
Patents and patent applications - net of accumulated amortization	13,687	14,373
Total assets	39,436,786	40,280,509
Current liabilities
Accounts payable and accrued expenses	1,419,770	1,316,773
Accrued salaries and wages	987,772	1,237,661
Royalty payable	1,403,832	1,620,182
Deferred revenue	817,472	918,272
Operating leases - current	476,904	516,931
Total current liabilities	5,105,750	5,609,819
Long-term liabilities
Operating leases - long term	34,778	254,664
Total long-term liabilities	34,778	254,664
Total liabilities	5,140,528	5,864,483
Stockholders' equity
Common stock; par value $0.001; 200,000,000 shares authorized; 4,258,105 and 4,186,438 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	4,259	4,187
Additional paid-in capital	99,331,183	97,239,455
Accumulated other comprehensive loss	(310,720)	0
Accumulated deficit	(64,728,464)	(62,827,616)
Total stockholders' equity	34,296,258	34,416,026
Total liabilities and stockholders' equity	$ 39,436,786	$ 40,280,509