CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (35,456,404)	$ (12,015,161)
Income from discontinued operations, net		(31,390)
Gain on sale of discontinued operations, net		(500,217)
Adjustments to reconcile net loss from continuing operations to net cash used in operating activities:
Depreciation and amortization	1,310,373	1,175,679
Provision for uncollectible accounts	1,174,639	651,055
Provision for excess and obsolete inventory	1,804,051	774,237
Non-cash stock based compensation expense	4,652,926	2,795,475
Change in fair value of subordinated convertible notes and warrant liabilities	(3,100,911)	1,038,105
Non-cash interest expense	347,308	156,374
Financing cost related to subordinated convertible notes	1,100,000
Changes in operating assets and liabilities:
Accounts receivable	16,708,016	(37,773,159)
Unbilled contract costs and fees		27,886
Prepaid expenses and other current assets	(760,703)	(2,378,705)
Other long-term assets	(676,990)
Note receivable	(4,224,393)
Inventory	(42,592,628)	(16,836,010)
Accounts payable	13,495,812	18,982,798
Accrued expenses and payroll	(2,688,348)	5,035,471
Accrued restructuring	535,744	155,627
Accrued contract loss	293,749
Deferred revenue, current and long-term portion	4,509,042	8,921,886
Other liabilities	385,054	(52,130)
Total adjustments	(7,727,259)	(17,325,411)
Net cash used in operating activities in continuing operations	(43,183,663)	(29,872,179)
Net cash used in operating activities of discontinued operations		(61,921)
Net cash used in operating activities	(43,183,663)	(29,934,100)
Cash flows from investing activities:
Purchases of property and equipment	(5,126,397)	(1,428,710)
Net cash used in investing activities in continuing operations	(5,126,397)	(1,428,710)
Net cash provided by investing activities of discontinued operations		716,700
Net cash used in investing activities	(5,126,397)	(712,010)
Cash flows from financing activities:
Net borrowings under line of credit	19,675,000	12,000,000
Proceeds from employee stock purchase plan	861,966
Proceeds from (repayment of) note payable	(1,563,641)	11,826,500
Reduction of restricted cash		34,000
Net proceeds from issuance of subordinated convertible notes	14,900,000
Net proceeds from exercise of options to purchase common stock	560,634	1,532,885
Net proceeds from exercise of warrants to purchase common stock	1,923,078	3,149,639
Net cash provided by financing activities in continuing operations	36,357,037	28,543,024
Effects of foreign currency exchange rates on cash and cash equivalents		68,732
Net decrease in cash and cash equivalents	(11,953,023)	(2,034,354)
Cash and cash equivalents at beginning of period	30,094,162	13,369,208
Cash and cash equivalents at end of period	$ 18,141,139	$ 11,334,854