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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities:    
Net loss $ (1,442,367) $ (2,293,451)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 87,789 94,693
Loss on sale of asset 1,774
Change in assets and liabilities:    
Royalty receivables 325,638 (17,151)
Prepaid expenses and other current assets 191,899 58,476
Deferred revenue 32,500 20,000
Accounts payable and accrued expenses 1,046 223,299
Net cash used in operating activities (803,495) (1,912,360)
Cash flows from investing activities:    
Purchases of fixed assets (5,822) (5,018)
Proceeds from sale of investments and change in investments 1,523,333 (5,141)
Net cash provided by (used in) investing activities 1,517,511 (10,159)
Net increase (decrease) in cash and cash equivalents 714,016 (1,922,519)
Cash and cash equivalents at beginning of year 1,691,603 5,712,310
Cash and cash equivalents at end of period $ 2,405,619 $ 3,789,791