Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Accounts receivable, allowance for doubtful accounts	$ 803	$ 228
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred Stock of subsidiary, par value (in dollars per share)	$ 1	$ 1
Preferred Stock of subsidiary, authorized (in shares)	1,467,396	1,467,396
Preferred Stock of subsidiary, issued plus accrued and unpaid dividends (in shares)	1,284,730	1,284,730
Preferred Stock of subsidiary, outstanding plus accrued and unpaid dividends (in shares)	1,284,730	1,284,730
Preferred Stock of subsidiary, Liquidation value per share (in dollars per share)	$ 1.00	$ 1.00
Stockholders' Equity:
Preferred Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, authorized (in shares)	2,000,000	2,000,000
Preferred Stock, issued (in shares)	0	0
Preferred Stock, outstanding (in shares)	0	0
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, authorized (in shares)	75,000,000	75,000,000
Common Stock, issued (in shares)	56,186,121	56,068,248
Common Stock, outstanding (in shares)	56,147,911	56,030,038
Common Stock, in treasury (in shares)	38,210	38,210