Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Measurements

Summary of the valuation of financial instrument pricing levels

	Total		Level 1		Level 2		Level 3
2018
Equity investments	$	995,000	$	995,000	$	—	$	—
2017
Equity investments	$	1,052,000	$	1,052,000	$	—	$	—

Schedule of gains and losses on equity investments

Net losses recognized during the period on equity investments	$	(90,000)
Less: net gains recognized during the period on equity investments sold during the period		(15,000)
Unrealized losses recognized during the period on equity investments still held at period end	$	(105,000)

Summary of the valuation of pricing levels for non-financial assets that are measured at fair value on a non-recurring basis

	Total		Level 1		Level 2		Level 3
2018
Long-lived assets held for sale	$	531,000	$	—	$	—	$	531,000
2017
Long-lived assets held for sale	$	2,455,000	$	—	$	—	$	2,455,000