Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Rent Expense

Properties

Location	Annual Rent		Lease Expiration Date
Auburn, Washington	$	25,000	Month to Month
Baton Rouge, Louisiana	$	27,000	Month to Month
Champaign, Illinois	$	258,000	12/2014
Charlotte, North Carolina	$	61,000	3/2016
Hampstead, New Hampshire	$	24,000	8/2017
Pearl River, New York	$	105,000	8/2018
Pottsboro, Texas	$	18,000	8/2014
Stony Point, NY	$	106,000	6/2016
Tulsa, Oklahoma	$	26,000	12/2014

Summarized table of future commitments under operating leases

Future commitments under operating leases are summarized as follows:

Years ended December 31,	Amount
(in thousands)
- 2013	$	668
- 2014		537
- 2015		238
- 2016		181
- 2017		194
Total	$	1,818