10. STOCK-BASED COMPENSATION - Outstanding stock options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
A summary of outstanding stock options follows
Outstanding Options, Beginning Balance	354,710
Granted	0
Exercised	0
Expired or Forfeited	(5,089)
Outstanding Options, Ending Balance	349,621
Options fully vested and exercisable	172,485
Options expected to vest	177,136
Weighted average exercise price, outstanding beginning	$ 24.55
Granted	$ 0
Exercised	$ 0
Expired or Forfeited	$ 75.76
Weighted average exercise price, outstanding ending	$ 23.80
Weighted average exercise price, options fully vested and exercisable	$ 33.98
Weighted average exercise price, options expected to vest	$ 13.89
Options Outstanding, Weighted Average Remaining Contractual Life, Beginning	8 years
Options Outstanding, Weighted Average Remaining Contractual Life, Ending	7 years
Options Outstanding, Weighted Average Remaining Contractual Life, options fully vested and exercisable	5 years
Options Outstanding, Weighted Average Remaining Contractual Life, options expected to vest	8 years
Options outstanding and exercisable, exercise price range, lower limit	$ 9.97
Options outstanding and exercisable, exercise price range, upper limit	$ 103
Options expected to vest, exercise price range, lower limit	$ 9.97
Options expected to vest, exercise price range, upper limit	$ 16.80
Aggregate intrinsic value, outstanding beginning	$ 2,151
Aggregate intrinsic value, outstanding ending	2,151
Aggregate intrinsic value, options fully vested and exercisable	753
Aggregate intrinsic value, options expected to vest	$ 1,399