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Discontinued Operations - Additional Information (Details)
 3 Months Ended 12 Months Ended
Sep. 01, 2016
USD ($)
option
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
 [1]
Jun. 30, 2016
USD ($)
 [1]
Mar. 31, 2016
USD ($)
 [1]
Dec. 31, 2015
USD ($)
 [1]
Sep. 30, 2015
USD ($)
 [1]
Jun. 30, 2015
USD ($)
 [1]
Mar. 31, 2015
USD ($)
 [1]
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Repayments of lines of credit                   $ 134,792,000 $ 144,567,000 $ 156,106,000
Revenues   $ 27,090,000 [1] $ 26,711,000 $ 32,241,000 $ 34,206,000 $ 34,791,000 $ 31,687,000 $ 32,333,000 $ 35,577,000 120,248,000 134,388,000 154,625,000
Cost of revenues                   44,114,000 46,366,000 44,958,000
Supply agreement [Member]                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Contracts revenue (less than)                   2,600,000    
Cost of sales on contract revenues                   2,300,000    
International                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Revenues                   10,300,000 19,200,000 27,100,000
Cost of revenues                   8,900,000 18,500,000 25,700,000
Deerfield facility agreement and amended credit facility | Line of credit                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Repayments of lines of credit $ 66,000,000                      
Globus facility agreement                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Maximum borrowing capacity $ 30,000,000 $ 30,000,000               30,000,000    
Globus facility agreement | Line of credit                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Line of credit, expiration period 5 years                      
Discontinued operations, disposed of by sale | International operations                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Noncompete agreement term 2 years                      
Consideration received $ 80,000,000                      
Supply commitment term 3 years                      
Supply agreement, number of annual options to extend | option 2                      
Supply obligation credit $ 1,927,000                      
Supply obligation credit term 6 months                      
Interest expense, debt excluding amortization                   7,004,000 8,588,000 10,594,000
Discontinued operations, disposed of by sale | International operations | Maximum                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Supply obligation credit $ 2,200,000                      
Discontinued operations, disposed of by sale | International operations | Deerfield facility agreement and amended credit facility                        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                        
Interest expense, debt excluding amortization                   $ 7,000,000 $ 8,600,000 $ 10,600,000
[1] Selected quarterly financial data for periods prior to the nine months ended September 30, 2016 have been recast to reflect discontinued operations.