Quarterly Results of Operations (Unaudited) - Quarterly Consolidated Statement of Operations Data (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 9,293	$ 26,306	$ 7,864	$ 13,623	$ 16,570	$ 14,313	$ 16,223	$ 16,287	$ 57,086	$ 63,393	$ 52,937
Gross profit	9,235	26,255	7,805	13,600	16,477	14,196	16,108	16,172
Operating income (loss)	(11,208)	10,114	(9,561)	(4,608)	1,289	1,283	2,217	(70)	(15,263)	4,719	5,967
Income (loss) from continuing operations before provisions for income taxes	(11,363)	10,778	(9,528)	(4,396)	1,082	1,199	2,263	(95)	(14,509)	4,449	6,319
Benefit (provision) for income taxes	(26,785)	(3,760)	3,323	1,701	56	(1,015)	(668)	36	(25,521)	(1,591)	(2,196)
Income (loss) from continuing operations	(38,148)	7,018	(6,205)	(2,695)	1,138	184	1,595	(59)	(40,030)	2,858	4,123
Income from discontinued operations, net of tax	0	0	649	0	0	0	0	0	649	0	0
Net income (loss)	$ (38,148)	$ 7,018	$ (5,556)	$ (2,695)	$ 1,138	$ 184	$ 1,595	$ (59)	$ (39,381)	$ 2,858	$ 4,123
Basic net income (loss) per share - Continuing operations (in dollars per share)	$ (1.32)	$ 0.24	$ (0.22)	$ (0.09)	$ 0.04	$ 0.01	$ 0.06	$ 0.00	$ (1.39)	$ 0.10	$ 0.15
Basic net income (loss) per share - Discontinued operations (in dollars per share)	0.00	0.00	0.02	0.00	0.00	0.00	0.00	0.00	0.02	0.00	0.00
Basic net income (loss) per share (in dollars per share)	$ (1.32)	$ 0.24	$ (0.20)	$ (0.09)	$ 0.04	$ 0.01	$ 0.06	$ 0.00	$ (1.37)	$ 0.10	$ 0.15
Shares used in calculating basic net income (loss) per share (in shares)	28,860	28,849	28,834	28,493	28,305	28,190	28,070	27,818	28,759	28,097	28,246
Diluted net income (loss) per share - Continuing operations (in dollars per share)	$ (1.32)	$ 0.24	$ (0.22)	$ (0.09)	$ 0.04	$ 0.01	$ 0.06	$ 0.00	$ (1.39)	$ 0.10	$ 0.14
Diluted net income (loss) per share - Discontinued operations (in dollars per share)	0.00	0.00	0.02	0.00	0.00	0.00	0.00	0.00	0.02	0.00	0.00
Diluted net income (loss) per share (in dollars per shares)	$ (1.32)	$ 0.24	$ (0.20)	$ (0.09)	$ 0.04	$ 0.01	$ 0.06	$ 0.00	$ (1.37)	$ 0.10	$ 0.14
Shares used in calculating diluted net income (loss) per share (in shares)	28,860	29,298	28,834	28,493	29,322	29,134	28,906	27,818	28,759	29,015	29,144
Samsung Electronics
Segment Reporting Information [Line Items]
Revenues		$ 19,000