Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Sep. 29, 2019	Mar. 31, 2019	Apr. 01, 2018	Mar. 26, 2017	Mar. 27, 2016
Outstanding options
Outstanding, beginning of period (in shares)	591,500
Options Granted (in shares)	135,000
Options Exercised (in shares)	(48,125)
Outstanding, end of period (in shares)	678,375	591,500
Vested and exercisable, end of period (in shares)	339,145
Weighted Average Fair Value at Grant Date
Outstanding, beginning of period (in dollars per share)	$ 2.30
Options Granted (in dollars per share)	3.91
Options Exercised (in dollars per share)	2.25
Outstanding, end of period (in dollars per share)	2.63	$ 2.30
Vested and exercisable, end of period (in dollars per share)	2.22
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)	$ 2.22
Options Outstanding (in shares)	678,375
Options Exercisable (in shares)	339,145
Grant Fiscal Year 2020
Outstanding options
Options Granted (in shares)	135,000
Weighted Average Fair Value at Grant Date
Vested and exercisable, end of period (in dollars per share)	$ 18.03
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)	$ 18.03
Options Outstanding (in shares)	135,000
Valuation assumptions
Expected Stock Price Volatility (as a percent)	36.21%
Risk-Free Interest rate (as a percent)	2.70%
Expected Dividend Yield (as a percent)	4.44%
Average Expected Term	4 years
Resulting Black Scholes Value (in dollars per share)	$ 3.91
Grant Fiscal Year 2019
Outstanding options
Options Granted (in shares)		66,500
Weighted Average Fair Value at Grant Date
Vested and exercisable, end of period (in dollars per share)		$ 16.31
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)		$ 16.31
Options Outstanding (in shares)	61,500
Options Exercisable (in shares)	12,479
Valuation assumptions
Expected Stock Price Volatility (as a percent)		35.59%
Risk-Free Interest rate (as a percent)		3.11%
Expected Dividend Yield (as a percent)		4.99%
Average Expected Term		4 years
Resulting Black Scholes Value (in dollars per share)		$ 3.38
Grant Fiscal Year 2018
Outstanding options
Options Granted (in shares)			230,000
Weighted Average Fair Value at Grant Date
Vested and exercisable, end of period (in dollars per share)			$ 15.12
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)			$ 15.12
Options Outstanding (in shares)	131,250
Options Exercisable (in shares)	62,708
Valuation assumptions
Expected Stock Price Volatility (as a percent)			32.63%
Risk-Free Interest rate (as a percent)			1.96%
Expected Dividend Yield (as a percent)			5.34%
Average Expected Term			4 years
Resulting Black Scholes Value (in dollars per share)			$ 2.57
Grant Fiscal Year 2017
Outstanding options
Options Granted (in shares)				410,000
Weighted Average Fair Value at Grant Date
Vested and exercisable, end of period (in dollars per share)				$ 12.57
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)				$ 12.57
Options Outstanding (in shares)	310,625
Options Exercisable (in shares)	223,958
Grant Fiscal Year 2016
Outstanding options
Options Granted (in shares)					100,000
Weighted Average Fair Value at Grant Date
Vested and exercisable, end of period (in dollars per share)					$ 22.42
Additional Disclosures
Vested and exercisable, end of period (in dollars per share)					$ 22.42
Options Outstanding (in shares)	40,000
Options Exercisable (in shares)	40,000
Stock Options
Stock Options:
Unrecognized compensation costs (in dollars)	$ 0.9
Unrecognized compensation costs, period for recognition	3 years
First year vesting | Stock Options | Grant Fiscal Year 2020
Stock Options:
Vesting percentage	25.00%
Vesting period	1 year
Monthly vesting over 36 months | Stock Options | Grant Fiscal Year 2020
Stock Options:
Monthly percentage of vesting of share based compensation	2.78%
Additional vesting period after the initial period	3 years