CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2010	$ 6	$ 259	$ 275,641	$ (266,458)	$ 9,448
Balance (in shares) at Dec. 31, 2010	592	25,960,080
Issuance of common stock	0	12	1,995	0	2,007
Issuance of common stock (in shares)	0	1,122,950
Exercise of options	0	0	16	0	16
Exercise of options (in shares)	0	34,420
Issuance of options	0	0	460	0	460
Compensation cost related to stock options	0	0	296	0	296
Net income	0	0	0	30,713	30,713
Balance at Dec. 31, 2011	6	271	278,408	(235,745)	42,940
Balance (in shares) at Dec. 31, 2011	592	27,117,450
Issuance of common stock	0	10	1,940	0	1,950
Issuance of common stock (in shares)	0	1,000,000
Exercise of options	0	0	8	0	8
Exercise of options (in shares)	0	17,778
Issuance of options	0	0	1,131	0	1,131
Compensation cost related to stock options	0	0	115	0	115
Net income	0	0	0	390	390
Balance at Mar. 31, 2012	$ 6	$ 281	$ 281,602	$ (235,355)	$ 46,534
Balance (in shares) at Mar. 31, 2012	592	28,135,228