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Commitments and Contingencies (Details) (USD $) | 12 Months Ended | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Apr. 30, 2012 Settled litigation | Sep. 30, 2010 Settled litigation | Sep. 30, 2012 Settled litigation | Mar. 31, 2012 Settled litigation
Commitments and Contingencies |  |  |  |  |  |  |
Rent expense | $ 895,000 | $ 915,000 | $ 694,000 |  |  |  |
Future minimum lease payments, Operating leases |  |  |  |  |  |  |
2013 | 739,000 |  |  |  |  |  |
2014 | 764,000 |  |  |  |  |  |
2015 | 720,000 |  |  |  |  |  |
2016 | 743,000 |  |  |  |  |  |
2017 | 764,000 |  |  |  |  |  |
Thereafter | 1,943,000 |  |  |  |  |  |
Total minimum payments | 5,673,000 |  |  |  |  |  |
Future minimum lease payments, Purchase commitments |  |  |  |  |  |  |
2013 | 878,000 |  |  |  |  |  |
2014 | 566,000 |  |  |  |  |  |
2015 | 500,000 |  |  |  |  |  |
Total minimum payments | 1,944,000 |  |  |  |  |  |
Future minimum lease payments, Total |  |  |  |  |  |  |
2013 | 1,617,000 |  |  |  |  |  |
2014 | 1,330,000 |  |  |  |  |  |
2015 | 1,220,000 |  |  |  |  |  |
2016 | 743,000 |  |  |  |  |  |
2017 | 764,000 |  |  |  |  |  |
Thereafter | 1,943,000 |  |  |  |  |  |
Total minimum payments | 7,617,000 |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |
Contractual payment sought (in shares) |  |  |  |  | 200,000 |  |
Cash award |  |  |  | 1,400,000 |  |  |
Value of shares retired, which were sought as damages |  |  |  |  |  |  | 800,000
Amount recorded as expense |  |  |  |  |  | $ 600,000 |

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