Common Stock - Additional Information (Details) - USD ($)			3 Months Ended	9 Months Ended
	Sep. 27, 2019	Mar. 27, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 28, 2019	Dec. 31, 2018
Subsidiary Sale Of Stock [Line Items]
Common stock, shares authorized			10,000,000	10,000,000
Common stock, par value			$ 0.01	$ 0.01
Common stock, shares issued			3,615,500	3,615,500		0
Common stock, shares outstanding			3,615,500	3,615,500		0
Stock-based compensation expense			$ 0	$ 0
Notice period prior to the payment of extraordinary dividend				30 days
Notice period prior to the payment of ordinary dividend.				10 days
Chief Executive Officer [Member] | Common stock [Member]
Subsidiary Sale Of Stock [Line Items]
Options granted to purchase common stock, shares	216,930
Exercise price of common stock per share	$ 12.01
Shares to be vested	108,465				108,465
Shares vesting period				3 years 6 months
Vested shares exercisable from date of vesting				8 years
IPO [Member]
Subsidiary Sale Of Stock [Line Items]
Common stock issued during period		3,615,500