Debt (Details)						6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2013 Dansensor USD ($)	Jun. 30, 2013 Dansensor DKK	Dec. 31, 2012 Dansensor USD ($)	Jun. 30, 2013 Secured term note payable USD ($)	Jun. 30, 2013 Revolving line of credit USD ($)	Dec. 31, 2012 Revolving line of credit USD ($)	Jun. 30, 2013 Seller financed secured note payable USD ($)	Jun. 30, 2013 Bank term note payable and seller financed secured note payable USD ($)
Bank Financing
Note payable to the bank, with interest at 3.46%, payable in monthly principal installments of $72,917 plus interest through March 28, 2016, collateralized by all the assets of the Company except Dansensor stock	$ 2,479,161	$ 2,916,664
Seller financed note payable (Seller Note), with interest at 3.46%, payable in semi-annual principal and interest payments totaling $891,000 beginning October 2, 2012 through April 2, 2015, collateralized by 65% of the outstanding stock of Dansensor.	2,644,398	3,517,067
Capital leases	51,946	59,286
Total long-term notes payable	5,175,505	6,493,017
Less current portion of long-term notes payable	2,562,544	2,566,154
Total long-term notes payable	2,612,961	3,926,863
Fixed interest rate (as a percent)						3.46%			3.46%
Monthly principal installments						72,917
Semi-annual installments payable of principal and interest									891,000
Percentage of common stock secured for debt									65.00%
Maximum borrowing capacity			1,700,000	10,000,000			5,000,000	5,000,000
Reference rate							one-month LIBOR	one-month LIBOR
Basis spread over reference rate (as a percent)							0.0175%	0.0175%
Interest rate at the end of period (as a percent)							2.00%	2.00%
Outstanding revolving line of credit			0		652,000		4,420,000	4,675,000
Interest rate charged on borrowings (as a percent)			4.35%	4.35%
Financial covenants, amount of borrowings	6,900,000
Future minimum principal payments of the long- term notes payable
2013										1,277,276
2014										2,598,885
2015										990,937
2016										305,579
2017										2,828
Total long-term notes payable										$ 5,175,505