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Note 8 - Debt (Details Textual) |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 03, 2020 USD ($) | Apr. 03, 2019 USD ($) | Apr. 03, 2017 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Interest Expense, Debt |  |  |  | $ 3,000,000 | $ 800,000 | $ 3,100,000 | $ 1,700,000 |
Amortization of Debt Issuance Costs |  |  |  | 500,000 |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  |  | 800,000 |  | 800,000 |  |
Tealstone Construction [Member] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 55,000,000 |  |  |  |  |
Fair Value Inputs, Discount Rate |  |  | 12.00% |  |  |  |  |
Business Combination, Consideration Transferred, Deferred Payments |  |  | $ 7,211,000 |  |  |  |  |
Accretion Expense |  |  |  | 300,000 |  | 300,000 |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  | 4,436,000 |  |  |  |  |
Tealstone Construction [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 7,500,000 | $ 2,500,000 |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  | $ 0
Warrants to the Lenders Under the Loan Agreement [Member] |  |  |  |  |  |  |  |
Warrants and Rights Outstanding |  |  | 3,500,000 | 3,500,000 |  | 3,500,000 |  |
Senior Secured Term Loans [Member] |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  | 9,869,000 |  | 9,869,000 |  | 803,000
Long-term Debt, Fair Value |  |  |  | 85,000,000 |  | 85,000,000 |  | 3,500,000
Notes Payable for Transportation and Construction Equipment [Member] |  |  |  |  |  |  |  |
Notes Payable, Noncurrent |  |  |  | $ 2,100,000 |  | $ 2,100,000 |  | $ 2,700,000
Notes Payable for Transportation and Construction Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  | 3 years |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.15% |  | 3.15% |  |
Notes Payable for Transportation and Construction Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  | 5 years |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.92% |  | 6.92% |  |
Wilmington Trust, National Association [Member] | Loan and Security Agreement [Member] | Senior Secured Term Loans [Member] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 85,000,000 |  |  |  |  |
Loan Prepayment Offer Required to Make Quarterly, Percentage |  |  | 75.00% |  |  |  |  |
Debt Instrument, Financial Covenants, Maximum Ratio of Secured Indebtedness to EBITDA, Period One |  |  | 3.1 |  |  |  |  |
Debt Instrument, Financial Covenants, Maximum Ratio of Secured Indebtedness to EBITDA, Period Two |  |  | 1.8 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Daily Cash Collateral, Period One |  |  | $ 10,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Daily Cash Collateral, Period Two |  |  | 15,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Daily Cash Collateral, Potential Additional Period |  |  | 18,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Rolling Four Quarter Gross Margin in Contract Backlog, Period One |  |  | 60,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Rolling Four Quarter Gross Margin in Contract Backlog, Period Two |  |  | 70,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Maximum Incurrence of Net Capital Expenditures During Each of Four Consecutive Fiscal Quarters |  |  | 15,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum Bonding Capacity |  |  | 1,000,000,000 |  |  |  |  |
Debt Instrument, Financial Covenants, Minimum EBITDA During Each Four Consecutive Fiscal Quarters |  |  | $ 12,000,000 |  |  |  |  |
Debt Issuance Costs, Net |  |  |  | $ 10,400,000 |  | $ 10,400,000 |  |
Debt Instrument, Term |  |  |  |  |  | 5 years |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | $ 500,000 |  |
Wilmington Trust, National Association [Member] | Loan and Security Agreement [Member] | Senior Secured Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 8.75% |  |  |  |  |

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- Definition Represents the maximum incurrence of net capital expenditures during each of four consecutive fiscal quarters under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the maximum ratio of secured indebtedness to EBITDA, for a certain specified first period of time following the current date, under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the maximum ratio of secured indebtedness to EBITDA, for a certain specified second period of time following the current date, under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the minimum bonding capacity under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the minimum EBITDA during each four consecutive fiscal quarters, for a certain specified period of time following the current date, under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the minimum rolling four quarter gross margin in contract backlog, for a certain specified first period of time following the current date, under the financial covenants pursuant to a debt instrument. + References No definition available. + Details
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- Definition Represents the percentage of excess cash flow, plus accrued and unpaid interest thereon and a prepayment premium, required to be made quarterly to the lenders to prepay the loan. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + 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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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