Purchased Intangible Assets and Goodwill - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 49,384	$ 49,384
Accumulated amortization	22,064	20,276
Net carrying amount	27,320	29,108
Developed Technology Rights [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	16,032	16,032
Accumulated amortization	7,734	6,905
Net carrying amount	8,298	9,127
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	28,411	28,411
Accumulated amortization	10,489	9,608
Net carrying amount	17,922	18,803
Order or Production Backlog [Member] | Certain Flash Memory Product Assets from Atmel Corporation [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	2,779	2,779
Accumulated amortization	2,779	2,779
Order or Production Backlog [Member] | S3 Asic Semiconductors Limited [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	210	210
Accumulated amortization	210	210
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	662	662
Accumulated amortization	635	588
Net carrying amount	27	74
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	1,290	1,290
Accumulated amortization	217	186
Net carrying amount	$ 1,073	$ 1,104