Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Income Taxes [Line Items]
Valuation allowance release (recapture)	$ (845,000)	$ 495,000	$ 3,376,000
Income tax reconciliation of global intangible low-taxed income	$ 800,000	21,200,000	$ 15,100,000
Income tax holiday, description	The Company utilized the high-tax exception to exclude income from foreign jurisdictions with foreign taxes at an effective rate that is higher than 90 percent of the applicable highest U.S. corporate tax rate.
Percentage of deduction in GILTI	50.00%
Taxes Payable	$ 2,221,000	4,650,000
Operating Loss Carryforwards	$ 194,710,000
Operating Loss Carry Forwards Expiration Term	expire in varying amounts between 2022 and 2037
Operating Loss Carryforwards, Limitations on Use	The California net operating loss carryforwards expire in varying amounts between 2028 and 2040
Operating losses and research and development credits carryforwards limitations on use	. In 2020, California enacted Assembly Bill 85 which imposed limits on the usability of California state net operating losses and research and development credits in tax years beginning after 2019 and before 2023.
Deferred Tax Assets, Net	$ 3,002,000	$ 4,722,000
Statutory corporate income tax rate	21.70%	28.50%	(7.80%)
California
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 46,109,000
Swiss | STAAR Surgical AG | 2020 through 2024
Income Taxes [Line Items]
Income tax rate, tax holiday, percent	10.45%
Swiss | STAAR Surgical AG | 2025 through 2029
Income Taxes [Line Items]
Income tax rate, tax holiday, percent	10.90%
JAPAN
Income Taxes [Line Items]
Deferred Tax Assets, Net	$ 787,000	$ 1,073,000
JAPAN | STAAR Japan
Income Taxes [Line Items]
Deferred Tax Assets, Net	$ 41,000	$ 35,000
Statutory corporate income tax rate	25.59%