Summary of Significant Accounting Policies - Basis of Presentation and Use of Estimates (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 14, 2015	Dec. 31, 2015	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2018	Aug. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2016
Accounting Policies [Abstract]
Losses from operations			$ 1,218	$ 352	$ 1,239	$ 865	$ 807	$ 1,289	$ 1,129	$ 1,103	$ 3,674	$ 4,328
Net cash used in operating activities											1,177	2,109
Gross profits (losses) on product sales			(205)	$ 162	$ (444)	$ 52	145	$ (186)	$ 7	$ 116	(435)	82
Cash and cash equivalents			3,421				$ 3,582				3,421	$ 3,582			$ 6,030
Total consideration of sale price of Taiwan headquarters building		$ 5,200
Receipt from initial installment of cash consideration for the sale of its headquarters building	$ 3,000
Second installment														$ 1,000
Second installment yet to be received			1,000								1,000
Third installment yet to be received			1,200								1,200
Third installment													$ 1,200
Repayable of deposit on revoke of sale agreement			$ 3,000								$ 3,000