Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended					0 Months Ended		9 Months Ended		0 Months Ended		9 Months Ended			0 Months Ended		12 Months Ended	9 Months Ended
	Apr. 22, 2014	Sep. 30, 2014 Segment	Sep. 30, 2013 Segment	Sep. 30, 2014 Segment	Sep. 30, 2013 Segment	Dec. 31, 2013	Aug. 20, 2014	Dec. 31, 2012	Sep. 30, 2014 Level 1	Dec. 31, 2013 Level 1	Jun. 30, 2014 Series G Redeemable Convertible Preferred Stock	Jun. 30, 2014 Series G Preferred Stock	Sep. 30, 2014 Series G Preferred Stock	Sep. 30, 2013 Series G Preferred Stock	Apr. 22, 2014 Incentive Stock Options Employees	Apr. 22, 2014 Nonqualified Stock Options Consultants	Sep. 30, 2014 Tranche C Term Loan	Sep. 30, 2014 Tranche B loan	Sep. 30, 2014 New consolidated note	Jun. 30, 2014 Notes Payable One Series G Redeemable Convertible Preferred Stock	Sep. 30, 2014 Value Lighting	Dec. 31, 2013 Issuance of Equity	Sep. 30, 2014 Minimum	Sep. 30, 2014 Maximum
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments		2	2	2	2
Cash and cash equivalents		$ 2,398,000	$ 5,763,000	$ 2,398,000	$ 5,763,000	$ 1,757,000		$ 4,434,000
Cash flow from operations				(15,697,000)	(5,214,000)
Cash paid for acquisition related costs				900,000	3,300,000	3,600,000
Cash flow from operations						8,100,000
Working capital excluding cash and cash equivalent		16,300,000		16,300,000		(1,800,000)
Cash proceeds from issuance of convertible preferred stock																						10,000,000
Cash proceeds from issuance of common stock					4,948,000	5,000,000
Cash borrowed under a receivable financing facility						900,000
Proceeds from related party debt				18,103,000													18,600,000	10,800,000
Stock issued in noncash exchange											18,000,000
Debt exchanged with stock, amount													12,600,000	12,600,000						12,600,000
Accrued dividend settled in stock												5,400,000
Debt exchange with new consolidated note		5,700,000
Debt conversion,interest rate		9.00%
Debt conversion due date		Apr. 01, 2016
Debt instrument amount		2,700,000		2,700,000															2,600,000
Line of credit facility, maximum borrowing amount							25,000,000
Unamortized licensing fees Period																							3 years	10 years
Sales tax include in revenue		944,000	22,000	1,547,000	544,000
Cash equivalents at fair value									2,398,000	1,757,000
Maturity of temporary cash investments				3 months
Net deferred tax liabilities																					$ 5,600,000
Stock options granted	52,500	0		52,500											35,000	17,500
Stock options strike price	$ 3.02			$ 2.32
Stock options vesting period	3 years
Stock options vesting period beginning date	Apr. 22, 2015
Stock options expiration period	10 years
Anti-dilutive shares		27,200,000	23,000,000	27,200,000	23,000,000