Share-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock option exercises	$ 0	$ 326
NQOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 99
Proceeds from stock option exercises		$ 300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options granted (shares)	223,713
Number of options exercised (shares)	0
Number of options forfeited (shares)	(68,842)
Number of options expired (shares)	(12,946)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average purchase price (in US$ per share)	$ 13.13
Weighted Average Exercise Price, Exercised (in US$ per share)	0.00
Weighted Average Exercise Price, Forfeited (in US$ per share)	27.40
Weighted Average Exercise Price, Expired (in US$ per share)	31.70
Weighted Average Exercise Price, Ending balance (in US$ per share)	17.82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average fair value (in US$ per share)	$ 4.60
Weighted Average Remaining Life, Beginning balance	6 years 1 month 13 days
Weighted Average Remaining Life, Ending balance	6 years 1 month 13 days
Aggregate Intrinsic Value, Beginning balance	$ 6		$ 6
Aggregate intrinsic value, exercised	0
Aggregate Intrinsic Value, Ending balance	$ 6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding			339,974
NQOs | Vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options - Beginning balance (in shares)	198,049
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning balance (in US$ per share)	$ 27.35
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Life, Beginning balance		5 years 3 months
Weighted Average Remaining Life, Ending balance		5 years 3 months
Aggregate Intrinsic Value, Beginning balance				$ 40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Options, Vested and exercisable, Outstanding (in shares)			37,283
Options, Vested and exercisable, Weighted Average Exercise Price (in US$ per share)			$ 26.33
Options, Vested and exercisable, Weighted Average Remaining Contractual Term	1 year 8 months 15 days
Options, Vested and exercisable, Aggregate Intrinsic Value			$ 6
PNQs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock option exercises		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Life, Beginning balance	1 year 1 day
Weighted Average Remaining Life, Ending balance	1 year 1 day
PNQs | Farmer Bros. Co. Amended and Restated 2007 Long-term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 0	$ 100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options - Beginning balance (in shares)	229,961
Number of options granted (shares)	0
Number of options exercised (shares)	0
Number of options forfeited (shares)	(6,212)
Number of options expired (shares)	(149,031)
Number of options - Ending balance (in shares)	74,718
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning balance (in US$ per share)	$ 26.21
Weighted average purchase price (in US$ per share)	0.00
Weighted Average Exercise Price, Exercised (in US$ per share)	0.00
Weighted Average Exercise Price, Forfeited (in US$ per share)	32.85
Weighted Average Exercise Price, Expired (in US$ per share)	25.05
Weighted Average Exercise Price, Ending balance (in US$ per share)	$ 27.95
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Life, Beginning balance		1 year 2 months 23 days
Weighted Average Remaining Life, Ending balance		1 year 2 months 23 days
Aggregate Intrinsic Value, Beginning balance				$ 0
Aggregate intrinsic value, exercised	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Options, Vested and exercisable, Outstanding (in shares)			53,990
Options, Vested and exercisable, Weighted Average Exercise Price (in US$ per share)			$ 26.65
Options, Vested and exercisable, Weighted Average Remaining Contractual Term	8 months 40 days