Organization and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands				12 Months Ended
	Jan. 01, 2020 USD ($)	Feb. 12, 2019	May 24, 2018 USD ($) tranche shares	Dec. 31, 2019 USD ($) source segment depository_institution tranche shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Summary Of Significant Accounting Policy [Line Items]
Restricted cash balance				$ 105	$ 1,565	$ 3,333
Impairment charge					2,000	1,000
Number of revenue sources | source				2
Allowance for doubtful accounts				$ 1,567	1,882
Cost of sales				$ 223,574	161,485	136,710
Warranty period				1 year
Research and development costs				$ 100,721	76,856	$ 55,373
Number of depository institutions | depository_institution				4
Aggregate balances in depository institution accounts				$ 161,800
Cash surrender value of corporate-owned life insurance policies				$ 4,214	$ 3,596
Number of reportable segments of company | segment				2
Market capitalization goal for such tranche			$ 2,500,000
Market capitalization goal for such tranche increase by incremental			$ 1,000,000
New option granted (in shares) | shares				0	0	0
Risk-free interest rate				2.98%
Expected life of options				9 years 9 months 3 days
Prepaid Expenses and Other Current Assets
Summary Of Significant Accounting Policy [Line Items]
Restricted cash balance					$ 900
Other Current Assets
Summary Of Significant Accounting Policy [Line Items]
Restricted cash balance					700
Accounting Standards Update 2016-13 | Subsequent Event
Summary Of Significant Accounting Policy [Line Items]
Expected credit loss	$ 1,000
Advertising
Summary Of Significant Accounting Policy [Line Items]
Cost of sales				$ 900	1,100	$ 500
Performance Shares
Summary Of Significant Accounting Policy [Line Items]
New option granted (in shares) | shares			6,365,856
Post exercise holding period				2 years 6 months
Chief Executive Officer
Summary Of Significant Accounting Policy [Line Items]
Restricted stock, expiration period			10 years
Number of vesting tranches of share-based awards | tranche			12
2019 eXponential Stock Performance Plan | eXponential Stock Units
Summary Of Significant Accounting Policy [Line Items]
Restricted stock, expiration period		9 years
Number of vesting tranches of share-based awards | tranche				12
Market capitalization goal for such tranche				$ 2,500,000
Market capitalization goal for such tranche increase by incremental				$ 1,000,000
New option granted (in shares) | shares				5,900,000
Post exercise holding period				2 years 6 months
Expected dividend yield				0.00%
Minimum | 2019 eXponential Stock Performance Plan | eXponential Stock Units
Summary Of Significant Accounting Policy [Line Items]
Liquidity discount				9.80%
Risk-free interest rate				1.64%
Expected life of options				8 years 3 months 18 days
Expected volatility				44.12%
Maximum | 2019 eXponential Stock Performance Plan | eXponential Stock Units
Summary Of Significant Accounting Policy [Line Items]
Liquidity discount				16.80%
Risk-free interest rate				2.62%
Expected life of options				9 years
Expected volatility				45.47%
Enterprise Resource Planning System
Summary Of Significant Accounting Policy [Line Items]
Impairment charge				$ 1,300
Design of New Headquarters
Summary Of Significant Accounting Policy [Line Items]
Impairment charge					$ 700