Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

v3.5.0.2
Commitments and Contingencies - Narrative (Details)
1 Months Ended 9 Months Ended
Jun. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
T
shares
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Operating leases, rent expense   $ 3,056,658 $ 3,192,755  
Award as a percentage of salary   1    
Insurance deductible   $ 100,000   $ 100,000
Insurance aggregate stop loss   1,900,000   1,900,000
Accrued workers’ compensation and auto claims   998,542   739,775
Certain Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum aggregate award upon sale   1,800,000    
Maximum aggregate award upon IPO   900,000    
Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum aggregate award upon IPO   525,000    
One time cash bonus upon IPO   $ 300,000    
Executive Officer | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSU granted up IPO | shares   250,000    
Year one | Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   25.00%    
Year one | Executive Officer | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   33.33%    
Year two | Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   25.00%    
Year two | Executive Officer | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   33.33%    
Year three | Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   25.00%    
Year three | Executive Officer | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   33.33%    
Year four | Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage   25.00%    
Sand        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual commitment to purchase tons of sand | T   200,000    
Deposit paid $ 600,000      
Remaining purchase commitment   $ 2,200,000    
Standby Letters of Credit | Lease Payment Letters of Credit        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Letters of credit outstanding   1,630,560    
Letter of Credit | Insurance Programs Letters of Credit        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Letters of credit outstanding   $ 1,176,000   $ 1,176,000