BORROWINGS (Details)		1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 24, 2014 USD ($)	Jul. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Debt Instrument [Line Items]
Other current liabilities				$ 1,123,000		$ 1,123,000		$ 1,123,000	$ 0
Proceeds from debt issuance						5,500,000	$ 0	5,500,000		$ 0
Letters of credit, outstanding amount				505,000		505,000		505,000	580,000
Computer equipment acquired under capital lease obligations						362,000	325,000	362,000		325,000
Payment of capital lease obligation						362,000	325,000	362,000		$ 325,000
Future payment obligations under capital leases				0		0		0	0
Depreciation and amortization				6,613,000	$ 4,701,000	17,827,000	12,806,000
Equipment under capital leases
Debt Instrument [Line Items]
Computer equipment acquired under capital lease obligations						362,000			325,000
Payment of capital lease obligation						362,000			325,000
Fixed assets				4,900,000		4,900,000		4,900,000	4,700,000
Accumulated depreciation				3,400,000		3,400,000		3,400,000	2,800,000
Depreciation and amortization				218,000	$ 188,000	632,000	$ 518,000
Commercial purchasing card
Debt Instrument [Line Items]
Outstanding balance				1,000,000		1,000,000		1,000,000	803,000
Unused borrowing capacity				4,000,000		$ 4,000,000		4,000,000	$ 4,200,000
Loan Agreement
Debt Instrument [Line Items]
Debt instrument, face amount	$ 55,800,000
Period to satisfy conditions to loan agreement	60 days
Equity contributions to construction project	$ 37,400,000
Loan to value ratio	80.00%
Fixed charge coverage ratio, term						12 months
Fixed charge coverage ratio						1.15
Cash flow leverage ratio, term						12 months
Minimum liquidity						$ 50,000,000
Debt instrument, increase to borrowing capacity				20,000,000		20,000,000		20,000,000
Long-term debt				0		$ 0		0
Loan Agreement | During construction phase
Debt Instrument [Line Items]
Cash flow leverage ratio						3.00
Loan Agreement | Following construction phase
Debt Instrument [Line Items]
Cash flow leverage ratio						2.50
Loan Agreement | Default rate
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)						2.00%
Loan Agreement | Revolving credit facility
Debt Instrument [Line Items]
Debt instrument, face amount	$ 10,000,000
Debt instrument, term	3 years
Loan Agreement | Revolving credit facility | LIBOR
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	2.00%
Loan Agreement | Revolving credit facility | Alternate Base Rate
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	1.00%
Loan Agreement | Senior secured real estate loan
Debt Instrument [Line Items]
Debt instrument, face amount	$ 45,800,000
Loan Agreement | Term loan
Debt Instrument [Line Items]
Debt instrument, term						6 years 9 months
Loan Agreement | Real estate loan and term loan
Debt Instrument [Line Items]
Fixed rate following interest rate swap	4.60%
Annual principal payment				1,100,000		$ 1,100,000		1,100,000
Periodic payment terms, balloon payment				38,000,000		38,000,000		38,000,000
Loan Agreement | Real estate loan and term loan | LIBOR
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	2.00%
Loan Agreement | Real estate loan and term loan | Alternate Base Rate
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)	1.00%
Cryptobonds
Debt Instrument [Line Items]
Debt instrument, term		5 years
Fixed rate following interest rate swap		4.00%
Other current liabilities		$ (5,000,000)
Note receivable, fixed interest rate		3.00%
Note receivable, current		$ (5,000,000)
Note payable, fixed annual interest rate (as a percent)		7.00%
Note payable, redemption price (as a percent)		105.00%
Note payable, redemption price over par (as a percent)		5.00%
Net amounts of assets presented in the balance sheet				0		0		0
Gross amounts not offset in the balance sheet, Financial instruments				0		0		0
Gross amounts not offset in the balance sheet, Cash collateral received				0		0		0
Net amount				0		0		0
Cryptobonds | Chief Executive Officer
Debt Instrument [Line Items]
Other current liabilities				$ 500,000		$ 500,000		$ 500,000
Proceeds from debt issuance			$ 500,000
Interest expense based on revenue (as a percent)			0.11%
Note payable, fixed annual interest rate (as a percent)			7.00%
Note payable, redemption price (as a percent)			105.00%
Note payable, redemption price that may be called (as a percent)			102.50%
Cryptobonds | After November 1, 2015
Debt Instrument [Line Items]
Note payable, redemption price that may be called (as a percent)		102.50%
Cryptobonds | Prior to November 2, 2015
Debt Instrument [Line Items]
Note payable, redemption price that may be called (as a percent)		96.00%