Debt (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Debt (Textual) [Abstract]
Long-term debt	$ 12,839,000	$ 15,520,000
Extended date of mature, after	Mar. 02, 2013
Procurian term loan	25,000,000
Line of Credit Facility, Current Borrowing Capacity	13,000,000
Line of Credit Facility, Remaining Borrowing Capacity	12,000,000
Procurian term loan [Member]
Debt (Textual) [Abstract]
Long-term debt	12,800,000	15,500,000
Effective interest rate being paid	1.99%
Interest Rate Swap Hedge [Member]
Debt (Textual) [Abstract]
Effective interest rate being paid	3.09%
Line of Credit [Member] | Maximum [Member]
Debt (Textual) [Abstract]
Interest rates	2.50%
Line of Credit [Member] | Minimum [Member]
Debt (Textual) [Abstract]
Interest rates	1.75%
Term Loans [Member]
Debt (Textual) [Abstract]
Principal under the term loan	400,000
Term Loans [Member] | Maximum [Member]
Debt (Textual) [Abstract]
Interest rates	2.00%
Term Loans [Member] | Minimum [Member]
Debt (Textual) [Abstract]
Interest rates	1.50%
PNC Bank [Member] | Revolving Credit Facility [Member]
Debt (Textual) [Abstract]
Extended date of mature, before	Aug. 02, 2013
Line of credit facility, unused capacity, commitment fee	0.25%
Procurian term loan	15,000,000
PNC Bank [Member] | Procurian term loan [Member]
Debt (Textual) [Abstract]
Nonrefundable commitment fee upon the consummation	200,000
Federal fund open rate	Federal Funds Open Rates plus 0.5%
Federal fund open rate percentage	0.50%
Debt instrument basis spread on variable rate sum of daily LIBOR rate	Sum of the daily LIBOR rate plus 1.0%
Daily LIBOR rate percentage	1.00%
Debt instrument basis spread on variable rate daily to six month LIBOR rate	Daily to six month LIBOR rate plus a margin ranging from 1.75% to 2.5%
Line of credit facility, periodic payment, principal	300,000
Annual interest rate	Monthly
Procurian term loan	20,000,000
PNC Bank [Member] | Procurian term loan [Member] | Maximum [Member]
Debt (Textual) [Abstract]
Six Month LIBOR rate percentage	2.50%
PNC Bank [Member] | Procurian term loan [Member] | Minimum [Member]
Debt (Textual) [Abstract]
Six Month LIBOR rate percentage	1.75%
PNC Bank [Member] | Interest Rate Swap Hedge [Member]
Debt (Textual) [Abstract]
Term loan was effectively converted to a fixed interest rate	50.00%
Term loan was effectively converted to a fixed interest fate interest rate	1.34%
Line of credit facility, amount outstanding	0	0
PNC Bank [Member] | Letter of Credit [Member]
Debt (Textual) [Abstract]
Procurian term loan	5,000,000
Venture Bank [Member] | Revolving Credit Facility [Member]
Debt (Textual) [Abstract]
Prime rate	prime rate plus 2.0%
Prime rate percentage	2.00%
Prime rate for the period	0.00%
Line of credit facility, amount outstanding	0	400,000
Procurian term loan	1,000,000
Venture Bank [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt (Textual) [Abstract]
Prime rate percentage	7.00%
Comerica Bank [Member]
Debt (Textual) [Abstract]
Extended date of mature, before	Dec. 16, 2011
Extended date of mature, after	Dec. 14, 2012
Line of credit facility, unused capacity, commitment fee	0.25%
Line of credit facility, amount outstanding	0	0
Issuance fees	0.50%
Comerica Bank [Member] | Letter of Credit [Member]
Debt (Textual) [Abstract]
Procurian term loan	$ 10,000,000