CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Common Shares [Member]	Accumulated other comprehensive income (loss): [Member]	Retained earnings/(accumulated deficit): [Member]	Total
Balance at beginning at Jun. 30, 2017		$ 17,704	$ 33	$ (4,027)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		191
Shares issued under ATM	[1]	2,120
Share repurchases		(18)
Shares withheld from common stock issued to pay employee payroll taxes
Exercise of stock options (in shares)
ESPP shares issued		37
Net income				1,453	$ 1,453
Net change in unrealized gain (loss) from marketable equity investments, net of taxes			(64)
Balance at end at Mar. 31, 2018		20,034	(31)	(2,574)	17,429
Balance at beginning at Dec. 31, 2017		19,889	(91)	(3,054)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		142
Shares issued under ATM
Share repurchases		(18)
Exercise of stock options
ESPP shares issued		21
Net income				480
Net change in unrealized gain (loss) from marketable equity investments, net of taxes			60
Shares issued in connection with performance award vesting
Balance at end at Mar. 01, 2018		20,034	(31)	(2,574)	17,429
Balance at beginning at Dec. 31, 2017		19,889	(91)	(3,054)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					480
Balance at end at Mar. 31, 2018		20,034	(31)	(2,574)	17,429
Balance at beginning at Jun. 30, 2018		19,835	(153)	(2,406)	$ 17,276
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		28
Shares issued under ATM
Share repurchases		(2,675)
Shares withheld from common stock issued to pay employee payroll taxes		(101)
Exercise of stock options		7
Exercise of stock options (in shares)					3,000
ESPP shares issued		22
Net income				3,260	$ 3,260
Net change in unrealized gain (loss) from marketable equity investments, net of taxes			(163)
Balance at end at Mar. 31, 2019		17,116	(316)	854	17,654
Balance at beginning at Dec. 31, 2018		17,209	(349)	122
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		10
Shares issued under ATM
Share repurchases		(115)
Shares withheld from common stock issued to pay employee payroll taxes
Exercise of stock options
ESPP shares issued		12
Net income				732	732
Net change in unrealized gain (loss) from marketable equity investments, net of taxes			33
Balance at end at Mar. 31, 2019		$ 17,116	$ (316)	$ 854	$ 17,654

[1] Of the proceeds raised from the ATM shares issued during the first quarter of fiscal 2018, $142,000 were accounted for as a reduction of prepaid expenses.