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Revolving Credit Facility (Details) |  |  | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 16, 2019 USD ($) | Apr. 12, 2019 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Bank of America, N.A. [Member] | Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of Credit Facility, Expiration Date |  |  | Jul. 26, 2019 |
Outstanding borrowings |  |  |  | $ 0
Bank of America, N.A. [Member] | Letter of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Outstanding borrowings |  |  |  | $ 4,789,000
BMO Harris Bank [Member] | Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of Credit Facility, Expiration Date |  |  | Apr. 12, 2024 |
Outstanding borrowings |  |  | $ 0 |
Aggregate principal amount |  | $ 50,000,000 |  |
Maximum borrowing capacity |  | $ 42,500,000 |  |
Value of eligible accounts |  | 85.00% |  |
Value of eligible accounts supported by credit insurance |  | 90.00% |  |
Liquidation value |  | 85.00% |  |
Cost of eligible inventory |  | 75.00% |  |
Limitation amount |  | $ 30,000,000 |  |
Reduction of credit facility |  | $ 7,500,000 |  |
Reduction of credit facility, percentage |  | 15.00% |  |
BMO Harris Bank [Member] | Revolving Sub-Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Aggregate principal amount |  | $ 10,000,000 |  |
M & T Bank [Member] | Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of Credit Facility, Expiration Date |  |  | Apr. 16, 2021 |
Outstanding borrowings |  |  | $ 10,200,000 |
Collateral carrying value |  |  | $ 16,647,000 |
Aggregate principal amount | $ 40,000,000 |  |  |
Interest coverage ratio | 1.25 |  |  |
Interest rate |  |  | 4.45% |

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- Definition Line of Credit Facility, Collateral Amount + References No definition available. + Details
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- Definition Line Of Credit Facility, Limit Availability, Amount + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line Of Credit Facility, Limit Availability, Amount Reduced + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line Of Credit Facility, Limit Availability, Cost Of Eligible Inventory + References No definition available. + Details
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- Definition Line Of Credit Facility, Limit Availability, Liquidation Value + References No definition available. + Details
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- Definition Line Of Credit Facility, Limit Availability, Percentage Reduced + References No definition available. + Details
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- Definition Line Of Credit Facility, Limit Availability, Value Of Eligible Accounts + References No definition available. + Details
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- Definition Line Of Credit Facility, Limit Availability, Value Of Eligible Accounts Supported By Insurance + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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