Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows From Operating Activities:
Net loss attributable to the Company	$ (17,897,143)	$ (13,062,656)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and investment in leased property	944,527	975,480
Amortization of intangible assets	1,142,021	1,148,764
Stock-based compensation	1,019,958	1,022,618
Gain on sale of equity interest in joint venture	(3,234,717)
(Gain) loss on disposal of property, plant and equipment	(55,768)	57,680
Change in fair value of common stock warrant liability	7,964,632	(2,291,801)
Changes in operating assets and liabilities that provide (use) cash:
Accounts receivable	(327,295)	2,263,242
Inventory	(44,849)	843,388
Prepaid expenses and other current assets	36,393	712,279
Note receivable	30,156	(600,419)
Accounts payable, accrued expenses, product warranty reserve and other liabilities	(2,425,008)	(1,032,845)
Deferred revenue	1,914,096	1,557,520
Net cash used in operating activities	(10,932,997)	(8,406,750)
Cash Flows From Investing Activities:
Proceeds from sale of equity interest in joint venture	3,234,717
Purchase of property, plant and equipment	(70,932)	(40,831)
Proceeds from disposal of property, plant and equipment	56,700	57,900
Net cash provided by investing activities	3,220,485	17,069
Cash Flows From Financing Activities:
Restricted cash	(750,000)
Proceeds from exercise of warrants	2,849,460
Proceeds from issuance of preferred stock	2,595,400
Preferred stock issuance costs	(144,321)
Proceeds from issuance of common stock and warrants	3,257,117	17,192,500
Common stock issuance costs	(943,557)	(1,402,230)
Repayment of borrowings under line of credit	(3,380,835)	(5,405,110)
Proceeds from finance obligation	2,600,000
Principal payments on obligations under capital lease and finance obligation	(338,179)
Net cash provided by financing activities	5,745,085	10,385,160
Effect of exchange rate changes on cash	(1,684)	(955)
Increase (decrease) in cash and cash equivalents	(1,969,111)	1,994,524
Cash and cash equivalents, beginning of period	9,380,059	13,856,893
Cash and cash equivalents, end of period	$ 7,410,948	$ 15,851,417