5. Earnings per share (Details) - Earnings per share reconciliation (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings per share reconciliation [Abstract]
Net income (in Dollars)	$ 175	$ 1,215	$ 569	$ 2,375
Basic: Weighted average common shares outstanding	8,376	8,728	8,374	8,722
Add: Dilutive effect of outstanding options as determined by the treasury stock method	144	74	164	81
Diluted: Weighted average common and common equivalent shares outstanding	8,520	8,802	8,538	8,803
Net income per common share:
Basic (in Dollars per share)	$ 0.02	$ 0.14	$ 0.07	$ 0.27
Diluted (in Dollars per share)	$ 0.02	$ 0.14	$ 0.07	$ 0.27