7. Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings per share:
Weighted average common shares - basic	26,234	25,029	25,936	24,694
Incremental common shares attibutable to exercise of outstanding options and warrants	5,683	6,973	6,019	7,315
Weighted average common shares - diluted	31,917	32,002	31,955	32,009