Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations, Assets Held for Sale, Impairment Charges - Depreciation, Capital Expenditures, and Significant Operating and Investing Non-Cash Items Related to Discontinued Operations (Details)

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Discontinued Operations, Assets Held for Sale, Impairment Charges - Depreciation, Capital Expenditures, and Significant Operating and Investing Non-Cash Items Related to Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Stock-based compensation $ 819 $ 272 $ 1,115 $ 382
Changes in deferred rent     (122) (56)
Services Business [Member] | Discontinued Operations, Held-for-sale [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Depreciation expense     391 562
Purchases of property and equipment     (527) (323)
Stock-based compensation     101 50
Changes in deferred rent     (122) (56)
Equipment purchases in accounts payable and accrued expenses     $ 20 $ 6