CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings
Balance, beginning at Jun. 30, 2017	$ 11,761	$ 186	$ 112,945	$ (101,370)
Balance, beginning (in shares) at Jun. 30, 2017		18,637,445
Increase (decrease) in stockholders' equity
Equity-based compensation activity	804	$ 1	803
Equity-based compensation activity (shares)		46,233
Net income	26,509			26,509
Balance, ending at Apr. 01, 2018	39,074	$ 187	113,748	(74,861)
Balance, ending (in shares) at Apr. 01, 2018		18,683,678
Balance, beginning at Dec. 31, 2017	27,301	$ 187	113,429	(86,315)
Balance, beginning (in shares) at Dec. 31, 2017		18,679,131
Increase (decrease) in stockholders' equity
Equity-based compensation activity	319		319
Equity-based compensation activity (shares)		4,547
Net income	11,454			11,454
Balance, ending at Apr. 01, 2018	39,074	$ 187	113,748	(74,861)
Balance, ending (in shares) at Apr. 01, 2018		18,683,678
Balance, beginning at Jun. 30, 2018	52,522	$ 187	114,052	(61,717)
Balance, beginning (in shares) at Jun. 30, 2018		18,682,338
Increase (decrease) in stockholders' equity
Equity-based compensation activity	1,013		1,013
Equity-based compensation activity (shares)		41,656
Net income	31,415			31,415
Balance, ending at Mar. 31, 2019	81,859	$ 187	115,065	(33,393)
Balance, ending (in shares) at Mar. 31, 2019		18,723,994
Balance, beginning at Dec. 30, 2018	68,725	$ 187	114,694	(46,156)
Balance, beginning (in shares) at Dec. 30, 2018		18,726,190
Increase (decrease) in stockholders' equity
Equity-based compensation activity	371		371
Equity-based compensation activity (shares)		(2,196)
Net income	12,763			12,763
Balance, ending at Mar. 31, 2019	81,859	$ 187	$ 115,065	(33,393)
Balance, ending (in shares) at Mar. 31, 2019		18,723,994
Increase (decrease) in stockholders' equity
Adoption of accounting standards (Note 2) | ASU 14-09	$ (3,091)			$ (3,091)