DEBT (Details) - USD ($)						1 Months Ended	12 Months Ended
	Sep. 19, 2019	Oct. 11, 2018	Sep. 18, 2018	Mar. 21, 2018	Oct. 31, 2017	Apr. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Debt
Short-term borrowings							$ 10,849,000	$ 3,274,000
Loan term (in years)		3 years
Term loan, net proceeds from borrowing								33,679,000
Current portion of term loan							700,000	525,000
Current debt							11,549,000	3,799,000
Unamortized deferred financing fees							(1,448,000)	(2,063,000)
Long-term debt, net							32,658,000	32,978,000
Total debt, net							44,207,000	36,777,000
Amortization of deferred financing costs							615,000	1,623,000
Restricted Cash and Cash Equivalents, Current							468,000	467,000
Scheduled maturities of the New Centre Lane Facility
Total debt, net							44,207,000	36,777,000
New Centre Lane Facility
Debt
Loan term (in years)			4 years
Term loan			$ 35,000,000				33,687,000	34,387,000
Net cash proceeds			1,000,000
Term loan, annual administrative fee			$ 25,000
Percentage of voting equity interests of domestic subsidiaries and certain specified foreign subsidiaries			100.00%
Percentage of voting equity interests of other directly owned foreign subsidiaries, subject to customary exceptions			65.00%
Prepayment of aggregate principal amount, as percentage of excess cash flow			75.00%
Threshold business days			5
Threshold consecutive days			90 days
Term loan, mandatory prepayment			$ 500,000
Current portion of term loan							700,000	525,000
Unamortized deferred financing fees							(1,029,000)	(1,409,000)
Total debt, net							$ 34,387,000
Interest rate on letters of credit issued under the revolving letter of credit sublimit							12.50%
Amortization of deferred financing costs							$ 380,000	111,000
Loan amendment expense							300,000
Scheduled maturities of the New Centre Lane Facility
2020							700,000
2021							700,000
2022							32,987,000
Total debt, net							34,387,000
New Centre Lane Facility | December 31, 2018 to June 30, 2019
Debt
Percentage of principal amount must repay			0.25%
New Centre Lane Facility | September 30, 2019
Debt
Percentage of principal amount must repay			0.50%
New Centre Lane Facility | Minimum
Debt
Term loan, periodic principal repayment	$ 1,000,000
New Centre Lane Facility | Payment In Cash | LIBOR-based loans
Debt
Term loan, interest rate			10.00%
New Centre Lane Facility | Payment In Cash | LIBOR-based loans | Minimum
Debt
Interest rate percentage			2.50%
Initial Centre Lane Term Facility
Debt
Amortization of deferred financing costs						$ 600,000		1,460,000
Midcap Financial Trust
Debt
Loan amendment expense							100,000
Payment and performance surety bonds
Debt
Outstanding surety bond							59,300,000	51,100,000
Secured asset based revolving credit facility | Midcap Financial Trust
Debt
Maximum borrowing capacity		$ 15,000,000
Short-term borrowings							10,800,000	3,300,000
Outstanding non-cash collateralized letters of credit							1,800,000	2,700,000
Available borrowings							$ 700,000	4,700,000
Unused line fee (as a percent)							0.50%
Borrowing availability against eligible accounts receivable (as a percentage)		85.00%
Term loan, interest rate		6.00%
Term loan, periodic principal repayment		$ 100,000
Current debt							$ 10,849,000	3,274,000
Amounts drawn upon letters of credit							0
Amortization of deferred financing costs							$ 235,000	52,000
Minimum casualty proceeds for repayment on occurrence of certain events		$ 25,000
Period prior to maturity for prepayment rate (in days)		90 days
Prepayment rate if termination occurs in first two year		2.00%
Prepayment rate if termination occurs in third year		1.50%
Prepayment rate if termination occurs after year three		1.00%
Secured asset based revolving credit facility | Midcap Financial Trust | Threshold One
Debt
Borrowing availability against eligible costs and estimated earnings in excess of billings, after certain customary exclusions and reserves (as a percentage)		80.00%
Secured asset based revolving credit facility | Midcap Financial Trust | Threshold Two
Debt
The line of credit facility maximum borrowing available, after customary exclusions and reserves		$ 1,000,000
Secured asset based revolving credit facility | Midcap Financial Trust | Maximum
Debt
Non-cash collateralized letters of credit		$ 6,000,000
Secured asset based revolving credit facility | Midcap Financial Trust | LIBOR-based loans | Minimum
Debt
Interest rate percentage		1.00%
Secured asset based revolving credit facility | Midcap Financial Trust | Payment In Cash | LIBOR-based loans
Debt
Term loan, interest rate		6.00%
September 19, 2019 to September 18, 2021 | New Centre Lane Facility
Debt
Debt Instrument, Redemption Period, Start Date							Sep. 19, 2019
Debt Instrument, Redemption Period, End Date							Sep. 18, 2021
Prepayment premium, percentage			1.00%
After September 18, 2021 | New Centre Lane Facility
Debt
Debt Instrument, Redemption Period, Start Date							Sep. 18, 2021
Prepayment premium, percentage			0.00%
Other Noncurrent Assets | Secured asset based revolving credit facility | Midcap Financial Trust
Debt
Unamortized deferred financing fees							$ (419,000)	(654,000)
Long-term debt, net | New Centre Lane Facility
Debt
Unamortized deferred financing fees							$ (1,029,000)	$ (1,409,000)
Interest Expense | Initial Centre Lane Term Facility
Debt
Loss on extinguishment of debt			$ 1,100,000
Mechanical Solutions | Discontinued operations disposed of by sale | Mexico
Debt
Proceeds from sale of property, plant and equipment					$ 3,600,000
Mechanical Solutions | Discontinued operations disposed of by sale | NETHERLANDS
Debt
Proceeds from sale of property, plant and equipment				$ 300,000