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Consolidated Statements of Cash Flows (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net loss $ (8,864,329) $ (9,206,868)
Loss from discontinued operations 0 1,227,748
Adjustments to reconcile net loss to net cash used in operating activities:    
Common stock, stock options and warrants issued as payment for compensation, services rendered and interest expense 2,218,530 2,476,666
Depreciation and amortization 554,954 385,095
Amortization of preferred stock discount and issuance cost 0 471,934
Changes in fair value of derivative liability (10,606) (87,291)
Bad debt expense 0 340,495
Prepaid expenses and other current assets (192,009) (238,528)
Accounts receivable 167,444 (426,768)
Inventory (428,549) (208,378)
Unearned revenues 346,912 260,137
Other assets (22,986) (180,000)
Accounts payable, accrued expenses and other current liabilities (905,094) 1,570,463
Net cash used in operating activities - continuing operations (7,135,733) (3,615,295)
Net cash provided by operating activities - discontinued operations 0 5,721,700
Net cash (used in) provided by operating activities (7,135,733) 2,106,405
Cash flows from investing activities:    
Acquisition of property and equipment (53,571) (131,975)
Net cash used in investing activities - continuing operations (53,571) (131,975)
Net cash provided by investing activities - discontinued operations 0 21,904
Net cash used in investing activities (53,571) (110,071)
Cash flows from financing activities:    
Net proceeds from exercise of warrants 105,881 0
Net proceeds from issuance of capital stock 2,730,262 7,691,059
Repayment of mortgage loan (43,446) (52,988)
Proceeds from notes payable 0 223,433
Repayment of notes payable (81,015) (66,333)
Repayment of preferred stock 0 (575,000)
Payment for warrant inducement (6,239) 0
Net cash provided by financing activities - continuing operations 2,705,443 7,220,171
Net cash used in financing activities - discontinued operations 0 (34,673)
Net cash provided by financing activities 2,705,443 7,185,498
Impact of changes of foreign exchange rates 0 (52,590)
Net (decrease) increase in cash and cash equivalents (4,483,861) 9,129,242
Cash and cash equivalents at beginning of period 13,737,452 12,642,147
Cash and cash equivalents at end of period 9,253,591 21,771,389
Less cash and cash equivalents of discontinued operations at end of period 0 14,766,629
Cash and cash equivalents of continuing operations at end of period 9,253,591 7,004,760
Cash paid during the period for:    
Interest 95,700 620,000
Taxes 0 286,100
Supplemental Schedule of non-cash investing activities:    
Capitalized interest 0 55,400
Supplemental schedule of non-cash financing activities    
Common stock issued pursuant to the redemption of Convertible Redeemable Series E 7% Preferred Stock 0 525,800
Common stock issued in payment of dividends for the Convertible Redeemable Series E 7% Preferred Stock $ 0 $ 104,200