CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Series C Preferred Stock [Member]	Additional Paid-in Capital [Member]	Common Stock Warrants [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2008	$ 1	$ 19	$ 23	$ 13	$ 86,357	$ 3,797		$ (74,083)	$ 16,127
Balance (in shares) at Dec. 31, 2008	1,453	18,755	23,280	12,520
Increase (Decrease) in Partners' Capital [Roll Forward]
Employee stock compensation plans, net	0	0	0	0	380	0		0	380
Dividend of subsidiary stock	0	0	0	0	0	0		(2,050)	(2,050)
Preferred stock dividends accrued	0	0	0	0	0	0		(3,042)	(3,042)
Comprehensive income (loss)
Net loss	0	0	0	0	0	0		(11,824)	(11,824)
Balance at Dec. 31, 2009	1	19	23	13	86,737	3,797		(90,999)	(409)
Balance (in shares) at Dec. 31, 2009	1,453	18,755	23,280	12,520
Increase (Decrease) in Partners' Capital [Roll Forward]
Employee stock compensation plans, net	0	0	0	0	900	0		0	900
Employee stock compensation plans, net (in shares)	18
Issuance of common stock, net of issuance costs	10	0	0	0	104,079	0		0	104,089
Issuance of common stock, net of issuance costs (in shares)	9,583
Issuance of common stock in connection with acquisition	3	0	0	0	34,618	0		0	34,621
Issuance of common stock in connection with acquisitions (in shares)	2,588
Beneficial conversion feature of Series B Preferred Stock	0	0	0	0	2,933	0		(2,933)	0
Beneficial conversion feature of Series C Preferred Stock	0	0	0	0	2,404			(2,404)	0
Conversion of Series A Preferred Stock	2	(19)	0	0	17	0		0	0
Conversion of Series A Preferred Stock (in shares)	1,797	(18,755)
Conversion of Series B Preferred Stock	1	0	(12)	0	11	0		0	0
Conversion of Series B Preferred Stock (in shares)	1,078		(11,640)
Conversion of Series C Preferred Stock	2	0	0	(13)	11	0		0	0
Conversion of Series C Preferred Stock (in shares)	2,504			(12,520)
Redemption of Series B Preferred Stock	0	0	(11)	0	(11,629)	0		0	(11,640)
Redemption of Series B Preferred Stock (in shares)			(11,640)
Warrant modification charges	0	0	0	0	0	2,491		(2,491)	0
Subordinated debt warrants	0	0	0	0	0	722		0	722
Warrant expiration	0	0	0	0	44	(44)		0	0
Preferred stock dividends accrued	0	0	0	0	0	0		(2,003)	(2,003)
Comprehensive income (loss)
Net loss	0	0	0	0	0	0		(12,893)	(12,893)
Foreign currency translation adjustment, net	0	0	0	0	0	0	50	0	50
Total comprehensive income (loss)	0	0	0	0	0	0	0	0	(12,843)
Balance at Dec. 31, 2010	19	0	0	0	220,125	6,966	50	(113,723)	113,437
Balance (in shares) at Dec. 31, 2010	19,021
Increase (Decrease) in Partners' Capital [Roll Forward]
Employee stock compensation plans, net	0	0	0	0	1,376	0	0	0	1,376
Employee stock compensation plans, net (in shares)	78
Issuance of common stock, net of issuance costs	4	0	0	0	39,440	0	0	0	39,444
Issuance of common stock, net of issuance costs (in shares)	3,751
Issuance of common stock in connection with acquisition	1	0	0	0	10,279	0	0	0	10,280
Issuance of common stock in connection with acquisitions (in shares)	808
Issuance of warrant	0	0	0	0	0	41	0	0	41
Comprehensive income (loss)
Net loss	0	0	0	0	0	0	0	(14,379)	(14,379)
Foreign currency translation adjustment, net	0	0	0	0	0	0	(570)	0	(570)
Total comprehensive income (loss)	0	0	0	0	0	0	0	0	(14,949)
Balance at Dec. 31, 2011	$ 24	$ 0	$ 0	$ 0	$ 271,220	$ 7,007	$ (520)	$ (128,102)	$ 149,629
Balance (in shares) at Dec. 31, 2011	23,658