Operating segment information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Oil and Gas Operations
Segment Operating revenue		$ 324
Segment Operating expenses		308
Segment Depreciation, depletion and amortization		187
Segment Total operating expenses		495
Segment Interest expense		(24)
Segment Segment operating income		(195)
Segment Operating revenue	410
Segment Operating expenses	307
Segment Depreciation, depletion and amortization	140
Segment Total operating expenses	447
Segment Interest expense	(22)
Segment operating income	(59)
Segment Operating revenue				1,048
Segment Operating expenses				874
Segment Depreciation, depletion and amortization				570
Segment Total operating expenses				1,444
Segment Interest expense				(97)
Segment operating income				(493)
Segment Operating revenue			1,239
Segment Operating expenses			924
Segment Depreciation, depletion and amortization			431
Segment Total operating expenses			1,355
Segment Interest expense			(75)
Segment operating income			(191)
Retirement Facility
Segment Operating revenue		694
Segment Operating expenses		357
Segment Depreciation, depletion and amortization		15
Segment Lease expense		235
Segment Total operating expenses		607
Segment Segment operating income		87
Segment Operating revenue	721
Segment Operating expenses	382
Segment Depreciation, depletion and amortization	18
Segment Lease expense	240
Segment Total operating expenses	640
Segment operating income	81
Segment Operating revenue				2,040
Segment Operating expenses				1,096
Segment Depreciation, depletion and amortization				45
Segment Lease expense				707
Segment Total operating expenses				1,848
Segment operating income				192
Segment Operating revenue			2,174
Segment Operating expenses			1,134
Segment Depreciation, depletion and amortization			49
Segment Lease expense			721
Segment Total operating expenses			1,904
Segment operating income			270
Corporate
Segment Operating expenses		170
Segment Total operating expenses		170
Segment Interest income		1
Segment Recovery of bad debt expense		410
Segment Segment operating income		241
Segment Operating expenses	201
Segment Depreciation, depletion and amortization	7
Segment Total operating expenses	208
Segment Interest income	1
Segment Other income	(19)
Segment operating income	(226)
Segment Operating expenses				513
Segment Total operating expenses				513
Segment Interest income				9
Segment Recovery of bad debt expense				1,143
Segment Other income				(36)
Segment operating income				603
Segment Operating expenses			582
Segment Depreciation, depletion and amortization			23
Segment Total operating expenses			605
Segment Interest income			3
Segment Other income			180
Segment operating income			(422)
Total.
Segment Operating revenue		1,018
Segment Operating expenses		835
Segment Depreciation, depletion and amortization		202
Segment Lease expense		235
Segment Total operating expenses		1,272
Segment Interest income		1
Segment Interest expense		(24)
Segment Recovery of bad debt expense		410
Segment Other income		0
Segment Segment operating income		133
Segment Operating revenue	1,131
Segment Operating expenses	890
Segment Depreciation, depletion and amortization	165
Segment Lease expense	240
Segment Total operating expenses	1,295
Segment Interest income	1
Segment Interest expense	(22)
Segment Other income	(19)
Segment operating income	(204)
Segment Operating revenue				3,088
Segment Operating expenses				2,483
Segment Depreciation, depletion and amortization				615
Segment Lease expense				707
Segment Total operating expenses				3,805
Segment Interest income				9
Segment Interest expense				(97)
Segment Recovery of bad debt expense				1,143
Segment Other income				(36)
Segment operating income				302
Segment Operating revenue			3,413
Segment Operating expenses			2,640
Segment Depreciation, depletion and amortization			503
Segment Lease expense			721
Segment Total operating expenses			3,864
Segment Interest income			3
Segment Interest expense			(75)
Segment Recovery of bad debt expense			0
Segment Other income			180
Segment operating income			$ (343)