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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
Sep. 30, 2018
Mar. 31, 2018
Current assets:    
Cash $ 4,705,189 $ 7,179,237
Accounts receivable, net of allowance for doubtful accounts of $-0-, respectively 1,015,846 675,879
Inventory 4,485,942 4,898,001
Prepaid expenses and other current assets 170,806 949,284
Total current assets 10,377,783 13,702,401
Property and equipment, net of accumulated depreciation of $9,022,541 and $8,408,979, respectively 8,755,340 8,993,708
Intangible assets, net of accumulated amortization of $-0-, respectively 7,713,001 7,713,001
Other assets:    
Restricted cash - debt service for NJEDA bonds 394,402 391,566
Security deposits 80,575 81,932
Total other assets 474,977 473,498
Total assets 27,321,101 30,882,608
Current liabilities:    
Accounts payable 1,141,109 1,658,137
Accrued expenses 2,662,385 1,788,571
Deferred revenue, current portion 1,013,333 1,013,333
Bonds payable, current portion, net of bond issuance costs 80,822 75,822
Loans payable, current portion 466,778 578,841
Total current liabilities 5,364,427 5,114,704
Long-term liabilities:    
Deferred revenue, net of current portion 745,557 1,252,223
Bonds payable, net of current portion and bond issuance costs 1,420,224 1,508,134
Senior secured promissory note - related party 1,200,000 1,200,000
Loans payable, net current portion 631,510 623,020
Derivative financial instruments - warrants 2,241,500 2,667,871
Other long-term liabilities 44,295 41,144
Total long-term liabilities 6,283,086 7,292,392
Total liabilities 11,647,513 12,407,096
Mezzanine equity    
Series J convertible preferred stock; par value $0.01; 50 shares authorized, 24.0344 issued and outstanding as of September 30, 2018; 50 shares authorized, 24.0344 issued and outstanding as of March 31, 2018 13,903,960 13,903,960
Shareholders' equity:    
Common stock; par value $0.001; 995,000,000 shares authorized 816,962,249 shares issued and 816,862,249 outstanding as of September 30, 2018; 802,626,761 shares issued and 802,526,761 outstanding as of March 31, 2018 816,965 802,629
Additional paid-in capital 148,057,540 146,602,502
Treasury stock; 100,000 shares as of September 30, 2018 and March 31, 2018; at cost (306,841) (306,841)
Accumulated deficit (146,798,036) (142,526,738)
Total shareholders' equity 1,769,628 4,571,552
Total liabilities, mezzanine equity and shareholders' equity $ 27,321,101 $ 30,882,608