Factored Accounts and Receivables (Details) $ in Thousands, NOK in Millions	1 Months Ended
	Jan. 31, 2016	Sep. 30, 2017 NOK	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)
Accounts receivable, inventory advances and due from factor
Non-recourse receivables assigned to factor			$ 18,780	$ 20,226	$ 20,355
Client recourse receivables			4,244	1,634	3,009
Total receivables assigned to factor			23,024	21,860	23,364
Allowance for customer credits			(3,480)	(5,157)	(4,508)
Factor accounts receivable, net			19,544	16,703	18,856
Non-factored accounts receivable			5,456	4,743	4,851
Allowance for customer credits			(1,065)	(1,031)	(720)
Allowance for doubtful accounts			(203)	(190)	(642)
Non factored accounts receivable, net			4,188	3,522	3,489
Total accounts receivable, net			23,732	20,225	22,345
Risk of payment in the event of non-payment by the customers			4,200	$ 1,600	$ 3,000
A&R Factoring Agreement
Accounts receivable, inventory advances and due from factor
Required notice period for termination of the agreement by factor	60 days
Required written notice period for termination of the agreement prior to December 31, 2020	60 days
DFBG Swims | Factoring Agreement | DNB Bank
Accounts receivable, inventory advances and due from factor
Amount outstanding		NOK 28.4	$ 3,600
DFBG Swims | Factoring Agreement | DNB Bank | Maximum
Accounts receivable, inventory advances and due from factor
Financing Percentage on preapproved outstanding invoiced receivables		80.00%	80.00%
DFBG Swims | Factoring Agreement | DNB Bank | Machinery and Plant Lien | Maximum
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		NOK 10.0
DFBG Swims | Factoring Agreement | DNB Bank | Inventory Lien | Maximum
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		10.0
DFBG Swims | Factoring Agreement | DNB Bank | Factoring, First Lien
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		1.0
DFBG Swims | Factoring Agreement | DNB Bank | Factoring, Second Lien
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		4.0
DFBG Swims | Factoring Agreement | DNB Bank | Factoring, Third Lien
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		7.0
DFBG Swims | Factoring Agreement | DNB Bank | Factoring, Fourth Lien
Accounts receivable, inventory advances and due from factor
Collateral amount | NOK		NOK 2.5