Commitments and Contingencies (Narrative) (Details)			12 Months Ended
	Jul. 01, 2016 USD ($)	Sep. 10, 2015 USD ($) ft²	Dec. 31, 2018 USD ($) ft²	Dec. 31, 2018 ILS (₪)	Dec. 31, 2017 USD ($) Bonds	Dec. 31, 2017 ILS (₪) Bonds	Dec. 31, 2016 USD ($)	Jun. 14, 2016 ft²
Commitments And Contingencies [Line Items]
Asset retirement obligation			$ 720,000
Liabilities settled to Elijah License area
Number of charitable foundations established | Bonds					2	2
Percentage of royalty or equivalent interest					3.00%	3.00%
Aggregate percentage of royalty or equivalent interest					6.00%	6.00%
Lease payment due, monthly			$ 10,450	₪ 39,200
Lease renewal description			The Company has an option to renew the lease for another five years, provided it is not in breach of the agreement, where it is required as well to furnish a notice of intent to exercise the option six months prior to termination of lease, and it furnishes a bank guarantee and insurance confirmation prior to commencement of option period.	The Company has an option to renew the lease for another five years, provided it is not in breach of the agreement, where it is required as well to furnish a notice of intent to exercise the option six months prior to termination of lease, and it furnishes a bank guarantee and insurance confirmation prior to commencement of option period.
Rent, taxes, utilities, insurance, maintenance expenses			$ 309,000		$ 302,000		$ 285,000
Bank guarantees to government			1,236,000
Bank guarantees to others			80,000
Aggregate guarantee amount			1,316,000
Estimated future development costs			$ 250,000		270,000
Purchase vehicle down payment					$ 15,000
Lease term			The lease period is for 44 months (approximately 3.7 years, hereinafter the "lease period") starting on March 25, 2017 and ending on October 24, 2020.	The lease period is for 44 months (approximately 3.7 years, hereinafter the "lease period") starting on March 25, 2017 and ending on October 24, 2020.
Lease expiration date					Oct. 24, 2020	Oct. 24, 2020
Lease monthly payment					$ 1,100	₪ 4,000
Lease purchase option amount					21,000	₪ 75,000
Net carrying value of the capital lease asset			$ 52,000		63,000
Capital lease asset and a capital lease obligation amount			$ 71,000
Capital lease asset estimated useful life			7 years	7 years
Accumulated depreciation capital lease asset amounted			$ 19,000		$ 8,000
Accrued estimated loss amount			500,000
Pay for lease			$ 22,700	₪ 85,000
Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Area of property | ft²		7,276						1,498
Area of new property, total | ft²								8,774
Lease term			65 months (about 5.5 years) from December 1, 2015 to April 30, 2021.	65 months (about 5.5 years) from December 1, 2015 to April 30, 2021.
Lease expiration date		Apr. 30, 2021
David Mcdavid Plano Lincoln Mercury [Member]
Commitments And Contingencies [Line Items]
Lessor agreement description			The Company and David McDavid Plano Lincoln Mercury (as Lessor) signed a motor vehicle lease agreement for a 2017 Lincoln MKZ. The first payment of $873.87 was due on August 14, 2017 and this was paid on or around that date. The lease calls for 38 additional payments of $873.87 so that the sum of all 39 payments is $34,080.93. At the inception of the lease, and in addition to the sum of the 39 payments, a one-time payment of $5,000 was made. The value at the end of the lease has a residual value of $18,565.70 per the terms of the lease agreement. Additionally, the Company must pay to the Lessor $.20 cents per mile for each mile in excess of 82,081 miles. This lease is treated as an operating lease.	The Company and David McDavid Plano Lincoln Mercury (as Lessor) signed a motor vehicle lease agreement for a 2017 Lincoln MKZ. The first payment of $873.87 was due on August 14, 2017 and this was paid on or around that date. The lease calls for 38 additional payments of $873.87 so that the sum of all 39 payments is $34,080.93. At the inception of the lease, and in addition to the sum of the 39 payments, a one-time payment of $5,000 was made. The value at the end of the lease has a residual value of $18,565.70 per the terms of the lease agreement. Additionally, the Company must pay to the Lessor $.20 cents per mile for each mile in excess of 82,081 miles. This lease is treated as an operating lease.
Caesarea Israel field office [Member]
Commitments And Contingencies [Line Items]
Lease term			The lease term is five years from February 1, 2014 to January 31, 2019	The lease term is five years from February 1, 2014 to January 31, 2019
July 2016 and extending through November 2016 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	$ 7,882
December 2016 and extending through May 2017 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	9,505.17
June 2017 and extending through May 2018 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	9,870.75
June 2018 and extending through May 2019 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	10,236.33
June 2019 and extending through May 2020 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	10,601.92
June 2020 and extending through May 2021 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly	$ 10,967.50
May 2016 through April 2017 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly		$ 7,882
May 2017 through April 2018 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly		8,186
May 2019 through April 2020 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly		8,792
May 2018 through April 2019 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly		8,489
May 2020 through April 2021 [Member] | Hartman income REIT Property Holdings LLC [Member]
Commitments And Contingencies [Line Items]
Lease payment due, monthly		$ 9,095
February 1, 2014 to January 31, 2019 [Member] | Caesarea Israel field office [Member]
Commitments And Contingencies [Line Items]
Area of property | ft²			6,566
Lease payment due, monthly			$ 10,100	₪ 37,800