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v3.19.1

Subsequent Events (Details) | Feb. 21, 2019 shares | Jan. 01, 2019 USD ($) renewal_option | Dec. 20, 2018 USD ($) | Dec. 31, 2018 USD ($) | Jun. 29, 2018 USD ($) renewal_option | Oct. 30, 2017 USD ($) | Sep. 30, 2016
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Subsequent Event [Line Items] |  |  |  |  |  |  |
Initial term of operating lease |  |  |  |  | 20 years |  |
Number of renewal options for operating leases | renewal_option |  |  |  |  | 2 |  |
Number of years in each renewal term for operating leases |  |  |  |  | 10 years |  | 10 years
Rent expense under operating leases due in first year |  |  |  | $ 3,207,053 |  |  |
Rent escalator under operating leases |  |  |  |  | 125.00% |  |
Maximum rent escalator percentage for operating leases |  |  |  |  | 2.00% |  |
Term Loan |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Debt term |  |  | 5 years |  |  |  |
Principal amount of debt |  |  | $ 20,000,000 |  |  |  |
ABL Line of Credit, Due October 30, 2020 | Revolving Line of Credit |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  | $ 100,000,000 | $ 93,860,450 | $ 80,000,000 | $ 65,000,000 |
Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Initial term of operating lease |  | 20 years |  |  |  |  |
Number of renewal options for operating leases | renewal_option |  | 2 |  |  |  |  |
Number of years in each renewal term for operating leases |  | 10 years |  |  |  |  |
Rent expense under operating leases due in first year |  | $ 430,000 |  |  |  |  |
Rent escalator under operating leases |  | 125.00% |  |  |  |  |
Maximum rent escalator percentage for operating leases |  | 2.00% |  |  |  |  |
Number of shares authorized to be repurchased (shares) | shares | 850,000 |  |  |  |  |  |
Period for shares to be repurchased | 24 months |  |  |  |  |  |
Subsequent Event | Term Loan |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Debt term |  | 5 years |  |  |  |  |
Principal amount of debt |  | $ 20,000,000 |  |  |  |  |
Subsequent Event | American Stainless Tubing, Inc. | American Stainless |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Purchase price |  | $ 22,736,854 |  |  |  |  |
Contingent consideration earn-out period |  | 3 years |  |  |  |  |
Subsequent Event | American Stainless Tubing, Inc. | American Stainless | Earn-Out Payment |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Percentage of earn-out payments |  | 6.50% |  |  |  |  |

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