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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash Flows From Operating Activities:    
Net Loss $ (8,678,347) $ (5,549,521)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:    
Depreciation and Amortization 187,527 129,076
Stock-based Compensation 1,517,302 446,003
Increase in Inventory Reserves 11,000 2,046,954
Amortization of Right of Use Asset 478,442  
Loss on Disposal of Assets   3,083
Realized (Gain) Loss on Sale of Investments Available-for-Sale (13,888) 2,892
Foreign Currency Translation Adjustment (92) (2,446)
Changes in Assets and Liabilities:    
Decrease in Accounts Receivable 268,104 295,973
Decrease in Insurance Receivable 371,217  
Decrease in Inventory 162,208 59,427
Decrease in Other Assets 203,982 238,438
Increase (Decrease) in Accounts Payable 30,154 (209,208)
Decrease in Settlement Payable (249,999)  
Decrease in Lease Liability (467,440)  
Increase (Decrease) in Other Liabilities 1,319,375 (1,494,969)
Decrease in Deferred License Revenue (563,217) (572,709)
Changes in Assets and Liabilities 1,074,384 (1,683,048)
Cash Used In Operating Activities (5,423,672) (4,607,007)
Cash Flows From Investing Activities:    
Purchase of Investments Available-for-Sale (8,812,954) (1,416,665)
Sale of Investments Available-for-Sale 12,761,519 1,050,554
Purchase of Equipment (121,826) (155,712)
Purchase of Research and Development Licenses (Related Party) (250,000)  
Cash Provided By (Used In) Investing Activities 3,576,739 (521,823)
Cash Flows From Financing Activities:    
Proceeds from the Exercise of Employee Stock Options 147,900  
Repurchase of Common Shares to Pay Employee Withholding Taxes (95,429)  
Cash Provided By Financing Activities 52,471  
Decrease In Cash and Cash Equivalents (1,794,462) (5,128,830)
Cash At Beginning Of Period 22,713,980 8,406,917
Cash At End Of Period 20,919,518 3,278,087
Supplemental Cash Flow Information:    
Change in Unrealized Loss on Marketable Securities Available-for-Sale (7,161) $ (189,995)
Delivery of Common Stock Underlying Restricted Stock Units $ 273,830