LONG-TERM DEBT AND CREDIT AGREEMENT Debt Disclosurre (Details) - USD ($)							3 Months Ended		9 Months Ended		12 Months Ended
	May 13, 2019	Apr. 08, 2019	Jan. 22, 2019	May 10, 2018	Dec. 15, 2017	Feb. 26, 2016	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Feb. 08, 2018	Nov. 09, 2017	Jun. 15, 2015
Debt Instrument, Periodic Payment, Principal							$ 351,000		$ 351,000
Term Loan, net of unamortized debt issuance costs							200,180,000		200,180,000		$ 122,811,000
Notes, net of unamortized original issue discount and debt issuance costs							27,821,000		27,821,000		97,731,000
Other Long-term Debt							1,297,000		1,297,000		1,453,000
Total debt							229,298,000		229,298,000		221,995,000
Short-term debt							29,705,000		29,705,000		1,405,000
Long-term Debt							199,593,000		199,593,000		$ 220,590,000
Line of Credit, Current							0		0
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction		$ 1,600,000							5,979,000	$ 0
Debt Related Commitment Fees and Debt Issuance Costs		$ 4,400,000
Interest Expense							5,519,000	$ 5,725,000	23,994,000	17,362,000
Convertible Debt Retired			3,900		2,000						16,247
Convertible Debt Issued			106,753									123,000		125,000,000
Extinguishment of Debt, Amount	$ 74,000,000.0		$ 3,900,000		$ 2,000,000.0						$ 16,200,000
Debt Instrument, Discounted Repurchase Amount	982.50
Debt Instrument, Face Amount														$ 1,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	600,000							$ (1,000)	(577,000)	(23,000)
Loss (Gain) on Extinguishment of Debt	$ 2,900,000								2,878,000	0
Convertible Note Options Outstanding	28,867
Repayments of Debt	$ 72,700,000		$ 3,600,000		$ 1,700,000						14,700,000
Convertible Notes unamortized issue discount and debt issuance costs							4,624,000		4,624,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							31,231,000		31,231,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							4,924,000		4,924,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							6,528,000		6,528,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							190,216,000		190,216,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							672,000		672,000
Total debt							233,922,000		233,922,000
Other Debt Obligations [Member]
Debt Instrument, Periodic Payment, Principal							32,000		32,000
Short-term debt							131,000		131,000
Long-term Debt							1,166,000		1,166,000
Convertible Notes unamortized issue discount and debt issuance costs							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Two							133,000		133,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							143,000		143,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							153,000		153,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							164,000		164,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							672,000		672,000
Total debt							1,297,000		1,297,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Periodic Payment, Principal							319,000		319,000
Short-term debt							1,753,000		1,753,000
Long-term Debt							198,427,000		198,427,000
Convertible Notes unamortized issue discount and debt issuance costs							3,578,000		3,578,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							2,231,000		2,231,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							4,781,000		4,781,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							6,375,000		6,375,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							190,052,000		190,052,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							0		0
Total debt							203,758,000		203,758,000
Convertible Debt [Member]
Debt Instrument, Periodic Payment, Principal							0		0
Short-term debt							27,821,000		27,821,000
Long-term Debt							0		0
Long-term Debt, Gross														$ 125,000,000.0
Debt Instrument, Interest Rate, Stated Percentage														2.00%
Interest Expense									500,000	$ 3,900,000
Convertible Notes unamortized issue discount and debt issuance costs							1,046,000		1,046,000		9,022,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							28,867,000		28,867,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Four							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Five							0		0
Long-term Debt, Maturities, Repayments of Principal after Year Five							0		0
Total debt							28,867,000		28,867,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Covenant Description		On April 8, 2019, we entered into an amendment to the Financing Agreement. The amendment provides for an additional delayed draw term loan commitment in the aggregate principal amount of $100.0 million (the “Delayed Draw Funds”) for the purpose of funding the purchase of a portion of Notes in the Offer described above. On May 2, 2019, we received the Delayed Draw Funds under the Financing Agreement. We used $72.7 million of the Delayed Draw Funds for the purchase of a portion of our Notes, $0.6 million for the Notes interest payment, and $6.0 million for the payment of refinancing fees. On June 18, 2019, we repaid $20.7 million of the Delayed Draw Funds. The $79.3 million Delayed Draw Funds borrowed will mature on May 10, 2023 under the Financing Agreement, and interest accrues on the Delayed Draw Funds and the existing outstanding borrowings under the Financing Agreement at a rate of either the LIBOR Rate (as defined in the Financing Agreement) plus 6.25% or a Reference Rate (as defined in the Financing Agreement) plus 5.25%, at our option. The amendment also modified the covenant that requires us to maintain a leverage ratio based on the level of availability of our Credit Facility plus unrestricted cash on-hand.		On May 10, 2018, we entered into an amendment to the Financing Agreement, which extended the maturity of the Financing Agreement to May 2023, and increased the Term Loan by $22.7 million and the amount available under the Credit Facility by $12.5 million, for an aggregate amount available of $22.5 million. Under the terms of the amendment, aggregate quarterly principal repayments beginning September 30, 2018 through June 30, 2020 will be $318,750, then from July 1, 2020 through June 30, 2021 equal to $796,875, and finally from July 1, 2021 through May 10, 2023 equal to $1,593,750.		We granted a security interest on substantially all of our assets to secure the obligations under the Term Loan and the Credit Facility. The Term Loan requires us to use 50% of excess cash flow, as defined in the Financing Agreement, to repay outstanding principal of the loans under the Financing Agreement. The Financing Agreement contains customary representations and warranties, covenants, mandatory prepayments, and events of default under which our payment obligations may be accelerated.
additional long term debt													$ 15,000,000.0
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000.0
Cerberus Business Finance LLC [Member] | Long-term Debt [Member]
Unamortized Debt Issuance Expense							3,578,000		3,578,000		$ 2,613,000
Long-term Debt						100,000,000.0
Interest Expense, Long-term Debt							$ 4,600,000		$ 11,700,000
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000.0