Term Loans (Details) (USD $)	1 Months Ended		3 Months Ended		9 Months Ended	1 Months Ended			7 Months Ended	12 Months Ended
	Jan. 31, 2014 payment	Mar. 31, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013 payment	Apr. 30, 2014	May 31, 2011 payment	Mar. 31, 2011	Jun. 30, 2013	Dec. 31, 2012 payment	Dec. 31, 2014
Future principal payments under the GECC and Oxford Term Loans
2015			$ 6,913,000
2016			4,607,000
Total principal payments			11,520,000
Less current portion			(9,221,000)								(9,214,000)
Long term obligation			2,299,000								4,607,000
GECC Term Loan
Term Loans
Proceeds from term loans		12,900,000
Annual interest rate on term loan (as a percent)			9.75%
Number of equal monthly payments of principal plus accrued interest	30				9
Exit fee to be paid			788,000
Interest expense recognized			400,000	600,000
Transaction and exit fees and expenses recognized in interest expense			100,000	100,000
Future principal payments under the GECC and Oxford Term Loans
Total principal payments		22,500,000			22,500,000
GECC Term Loan | Maximum
Term Loans
Amount of equipment financing allowed under covenants without any restriction			4,000,000
Oxford Term Loan
Term Loans
Proceeds from term loans								2,000,000
Annual interest rate on term loan (as a percent)			13.35%
Number of equal monthly payments of principal plus accrued interest							36
Interest expense recognized			13,000	20,000
Number of equal monthly payments of principal plus accrued interest										36
Full payment of the original loan						2,000,000
Principal amount of debt issued									600,000
Administrative, legal fees and expenses paid			108,000
Oxford Term Loan | Maximum
Term Loans
Additional amount that the Company may fully utilized in equipment financing										600,000
Oxford Term Loan | Minimum
Term Loans
Amount of debt assumption from acquisitions requiring prior written consent under covenants			$ 2,000,000