4. Accrued contingent consideration (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Mar. 31, 2014
Business Combinations [Abstract]
Business Combination, Contingent Consideration Arrangements, Description			30%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low				$ 0
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				150,000
Contingent Consideration Amount	40,000		40,000	60,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 20,000	$ 200,000