Equity - Non-Option Incentive (Details)		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 26, 2019 USD ($) employee shares	Sep. 30, 2014 shares	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) employee $ / shares shares
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $			$ 51,000	$ 206,000	$ 600,000	$ 209,000
Modification of previously awarded KELTIP Units | $					$ 583,000
Sentient | 2014 Warrants
Number of Shares - Non-option
Granted during the year (in shares)		4,746,000
KELTIP Units | Officers
Number of Shares - Non-option
Granted during the year (in shares)	705,000
Weighted Average Grant Date Fair Value Per Share - Non-option
Number of employees | employee	2
Equity Plan | Restricted Stock
Number of Shares - Non-option
Outstanding at beginning of year (in shares)					340,001
Granted during the year (in shares)					312,000
Restrictions lifted during the year (in shares)					(207,331)
Restriction lifted grants made in current year(in shares)					103,332
Restriction lifted grants made in prior year(in shares)					103,999
Outstanding at end of year (in shares)			444,670		444,670		340,001
Weighted Average Grant Date Fair Value Per Share - Non-option
Outstanding at beginning of year (in dollars per share) | $ / shares					$ 0.45
Granted during the year (in dollars per share) | $ / shares					0.26
Restrictions lifted during the year (in dollars per share) | $ / shares					0.36
Outstanding at end of year (in dollars per share) | $ / shares			$ 0.36		$ 0.36		$ 0.45
Compensation expense | $					$ 70,000
Additional compensation expense expected to be recognized | $			$ 113,000		$ 113,000
Period for future recognition of additional compensation expense					35 months
Restrictions lifted during the year (in shares)					207,331
Deferred Compensation Plan | Restricted Stock Units (RSUs)
Number of Shares - Non-option
Outstanding at beginning of year (in shares)					2,230,038
Granted during the year (in shares)					600,000
Outstanding at end of year (in shares)			2,830,038		2,830,038		2,230,038
Weighted Average Grant Date Fair Value Per Share - Non-option
Outstanding at beginning of year (in dollars per share) | $ / shares					$ 0.93
Granted during the year (in dollars per share) | $ / shares					0.24
Outstanding at end of year (in dollars per share) | $ / shares			$ 0.78		$ 0.78		$ 0.93
Compensation expense | $					$ 102,000
Additional compensation expense expected to be recognized | $			$ 141,000		$ 141,000
Period for future recognition of additional compensation expense					11 months
Number of unrestricted shares Director to receive for vested RSU upon termination from board					1
KELTIP | KELTIP Units | Officers
Number of Shares - Non-option
Granted during the year (in shares)							1,620,000
Weighted Average Grant Date Fair Value Per Share - Non-option
Compensation expense | $	$ 254,000					$ 31,000
Number of employees | employee							2
Liability related to KELTIP Units | $							$ 356,000
Additional compensation expense | $	227,000
Modification of previously awarded KELTIP Units | $	$ 583,000