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Subordinated debt (Details) - USD ($)		9 Months Ended
	Sep. 28, 2018	Sep. 30, 2018
Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 40,000,000
Interest rate	5.625%
Debt issuance costs		$ 841,556
Subordinated Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.55%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayment of line of credit	$ 15,000,000

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB
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-SubTopic 30
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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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.

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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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