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Short-Term Borrowings (Details) - USD ($)
3 Months Ended
Sep. 19, 2016
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]        
Line of credit     $ 25,000,000 $ 15,000,000
Trade Accounts Receivable | Foreign | Maximum        
Line of Credit Facility [Line Items]        
Line of credit facility, eligible accounts receivable 85.00%      
2016 Debt Agreement | Swingline loan        
Line of Credit Facility [Line Items]        
Line of credit facility current borrowings $ 10,000,000.0      
2016 Debt Agreement | Letter of Credit        
Line of Credit Facility [Line Items]        
Line of credit facility current borrowings 10,000,000.0      
Line of Credit | 2016 Debt Agreement        
Line of Credit Facility [Line Items]        
Line of credit facility current borrowings 55,000,000.0      
Line of credit facility, maximum borrowing capacity 25,000,000.0   55,000,000  
Line of credit facility, eligible accounts receivable threshold 7,500,000      
Line of credit, liquidity threshold 20,000,000.0      
Line of credit, liquidity threshold, last month of quarter 25,000,000.0      
Line of credit facility, annual administrative fee amount 25,000      
Line of Credit facility, annual commitment fee 82,500      
Deferred finance costs, net $ 300,000      
Line of credit facility, cancellation fee percentage 0.75%      
Line of credit     25,000,000 $ 15,000,000
Line of credit, remaining borrowing capacity     7,500,000  
Line of Credit | 2016 Debt Agreement | Availability, 70 Percent Or More        
Line of Credit Facility [Line Items]        
Line of credit facility, unused capacity, commitment fee percentage 0.35%      
Line of Credit | 2016 Debt Agreement | Availability, 70 Percent Or More | Prime Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 0.50%      
Line of Credit | 2016 Debt Agreement | Availability, 70 Percent Or More | Prime Rate | Forecasted        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate   0.25%    
Line of Credit | 2016 Debt Agreement | Availability, 30 Percent Or More And Less Than 70 Percent        
Line of Credit Facility [Line Items]        
Line of credit facility, unused capacity, commitment fee percentage 0.325%      
Line of Credit | 2016 Debt Agreement | Availability, 30 Percent Or More And Less Than 70 Percent | Prime Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 0.75%      
Line of Credit | 2016 Debt Agreement | Availability, 30 Percent Or More And Less Than 70 Percent | Prime Rate | Forecasted        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate   0.50%    
Line of Credit | 2016 Debt Agreement | Availability, Below 30 Percent        
Line of Credit Facility [Line Items]        
Line of credit facility, unused capacity, commitment fee percentage 0.30%      
Line of Credit | 2016 Debt Agreement | Availability, Below 30 Percent | Prime Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 1.00%      
Line of Credit | 2016 Debt Agreement | Availability, Below 30 Percent | Prime Rate | Forecasted        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate   0.75%    
Line of Credit | 2016 Debt Agreement | Minimum        
Line of Credit Facility [Line Items]        
Line of credit, liquidity threshold, last month of quarter     $ 40,000,000  
Line of credit facility, debt covenant, liquidity $ 15,000,000.0      
Line of credit facility, debt covenant, liquidity threshold, last month of quarter $ 20,000,000.0      
Line of Credit | 2016 Debt Agreement | Trade Accounts Receivable | Domestic        
Line of Credit Facility [Line Items]        
Line of credit facility, eligible accounts receivable 85.00%      
Line of Credit | 2016 Debt Agreement | Trade Accounts Receivable | Foreign | Minimum        
Line of Credit Facility [Line Items]        
Line of credit facility, eligible accounts receivable 75.00%