Note L - Stockholders' Equity (Detail) - Stock Option Transactions (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Shares	3,680,336	3,228,929
Weighted average exercise price (in Dollars per share)	$ 6.76	$ 7.95
Weighted average remaining contractual life (in years)	6 years 335 days
Aggregate intrinsic value (in Dollars)	$ 457
Shares	1,191,774	1,176,050	1,297,454
Weighted average exercise price (in Dollars per share)	$ 10.50
Weighted average remaining contractual life (in years)	3 years 332 days
Aggregate intrinsic value (in Dollars)	$ 24
Shares	949,500	1,178,600	318,300
Weighted average exercise price (in Dollars per share)	$ 3.34	$ 4.41	$ 11.21
Shares	(7,334)	(220,498)	(241,999)
Weighted average exercise price (in Dollars per share)	$ 0.73	$ 4.82	$ 5.15
Shares	(490,759)	(488,068)	(89,471)
Weighted average exercise price (in Dollars per share)	$ 8.10	$ 9.79	$ 9.95
Begining Balance [Member]
Shares			2,772,065
Weighted average exercise price (in Dollars per share)			$ 8.98
Ending Balance [Member]
Shares			2,758,895
Weighted average exercise price (in Dollars per share)			$ 9.54