Supplemental disclosure of cash flow and non-cash investing and financing activities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Supplemental disclosure of cash flow and non-cash investing and financing activities [Abstract]
Cash paid for interest	$ 118	$ 18
Income taxes paid	637	1,506
Stock issuance of 441,009 shares in connection with acquisition	$ 3,346	0
Shares issued in conjunction with acquisition (in shares)	441,009
Retirement of fixed assets	$ 0	319
Stock issuances of 43,344 and 16,493 shares in exchange for services performed, respectively	$ 346	$ 164
Shares issued for services performed (in shares)	43,344	16,493