STOCKHOLDERS’ EQUITY (Details)						1 Months Ended	3 Months Ended			6 Months Ended
	Jul. 28, 2017 $ / shares	Apr. 24, 2017 $ / shares	Feb. 27, 2017 USD ($) shares	Feb. 21, 2017 $ / shares	Oct. 13, 2016 $ / shares	Feb. 28, 2017 shares	Jun. 30, 2017 USD ($) $ / shares shares	Mar. 31, 2017	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2017 USD ($) item $ / shares shares	Jun. 30, 2016 USD ($) $ / shares	Dec. 31, 2016 USD ($)
Proceeds from Issuance of Convertible Preferred Stock | $										$ 65,000,000
Issuance of common stock | $										$ 65,000,000
Warrants
Shares that can be purchased out of each warrant							0.50			0.50
Exercise price per half share | $ / shares										$ 5.75
Exercise price per whole share | $ / shares							$ 11.50			$ 11.50
Number of fractional shares to be issued										0
Total number of warrants outstanding							35,040,664			35,040,664
Warrants to purchase shares of common stock							17,520,332			17,520,332
Expiration term of public warrants										5 years
Public Warrants [Member]
Total number of warrants outstanding							19,959,908			19,959,908
Warrants exercisable period										30 days
Number of trading days in which the price per share should equals or exceeds $24.00 per share to call the Public Warrants for redemption | item										20
Redemption price per warrant | $										$ 0.01
Redemption price per warrant subject to stated common stock value | $ / shares										$ 24.00
Number of trading days in which the common stock price equals or exceeds the specified price | item										20
Private Warrants [Member]
Total number of warrants outstanding							15,080,756			15,080,756
Hennessy Capital Acquisition Corp II and HCAC Merger Sub Inc
Proceeds from Issuance of Convertible Preferred Stock | $			$ 65,000,000
Series A
Initial conversion rate per share							8.6957			8.6957
Initial conversion rate per share | $ / shares							$ 11.50			$ 11.50
Number of years of anniversary from issue date for holder elects to convert (in years)										7 years
Number of consecutive trading days at option by delivery of Notice of Conversion (in days)										10 days
Number of consecutive trading days commencing on trading day immediately following notice (in days)										20 days
Shares would be issuable upon conversion of currently outstanding shares (in shares)										5,652,171
Minimum percentage of weighted average price of common stock under preferred stock conversion on or after third anniversary (as a percent)										140.00%
Minimum trading days of weighted average price of common stock under preferred stock conversion on or after third anniversary (in days)										20 days
Maximum trading days of weighted average price of common stock under preferred stock conversion on or after third anniversary (in days)										30 days
Minimum percentage of weighted average price of common stock under preferred stock conversion on or after fifth anniversary (as a percent)										115.00%
Minimum trading days of weighted average price of common stock under preferred stock conversion on or after fifth anniversary (in days)										20 days
Maximum trading days of weighted average price of common stock under preferred stock conversion on or after fifth anniversary (in days)										30 days
Minimum trading days of weighted average price of common stock under preferred stock conversion on or after seventh anniversary (in days)										10 days
Maximum days for conversion of preferred stock into common stock due to fundamental changes (in days)										15 days
Base price for calculation of conversion rate | $ / shares										$ 100.00
Percentage of closing sale price of common stock							66.67%			66.67%
Minimum percentage of shares of common stock owned by holder for limitation in preferred stock										9.99%
Maximum percentage of shares can be converted to common stock										19.99%
Preferred share liquidation amount per share | $ / shares							$ 100			$ 100
Dividend rate (as a percent)								7.625%		7.625%
Quarterly dividend (in dollars per share) | $ / shares		$ 0.68					$ 0.68			$ 0.68
Dividend paid (in dollars per share) | $ / shares	$ 0.68
Accrued convertible preferred dividends | $							$ 1,693,000			$ 1,693,000
Preferred stock dividend rate								7.625%		7.625%
Series A | Accrued expenses and other liabilities
Accrued convertible preferred dividends | $							$ 1,700,000			$ 1,700,000
Series A | Maximum
Number of business days following tenth consecutive trading day to convert shares (in days)										5 days
Number of trading days from receipt of Notice of Conversion (in days)										2 days
Series A | Hennessy Capital Acquisition Corp II and HCAC Merger Sub Inc
Issuance of common stock (in shares)										650,000
Proceeds from Issuance of Convertible Preferred Stock | $										$ 65,000,000
Series A | Private placement | Hennessy Capital Acquisition Corp II and HCAC Merger Sub Inc
Issuance of common stock (in shares)			650,000
Proceeds from Issuance of Convertible Preferred Stock | $			$ 65,000,000
Series B
Quarterly dividend (in dollars per share) | $ / shares				$ 12.50	$ 18.75				$ 18.75	$ 12.50	$ 37.50
Accrued convertible preferred dividends | $									$ 1,344,000		$ 1,344,000
Conversion of Convertible Stock to common shares (in shares)						9,301,150
Series B | Accrued expenses and other liabilities
Accrued convertible preferred dividends | $												$ 1,200,000