CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income (loss)	$ 11,526	$ (3,329)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization expense	58	76
Stock-based compensation expense	87	425
Loss on sale or impairment of investments	0	1,304
Net (income) from discontinued operations, net	0	(43)
Gain on sale of property, plant and equipment	12	0
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Notes and other receivables	37	1,065
Real estate, water, and intangible assets	4,473	5,246
Income taxes	275	0
Other assets	(103)	30
Deferred compensation	0	(2,247)
Accounts payable and accrued expenses	(752)	816
Other operating activities, net	0	6
Cash provided by operating activities - continuing operations	15,613	3,349
Cash used in operating activities - discontinued operations	0	(313)
Net cash provided by operating activities	15,613	3,036
Investing activities:
Proceeds from maturity of investments	0	80
Purchases of property, plant and equipment	(12)	(18)
Net cash provided by (used in) investing activities	(12)	62
Financing activities:
Payment of withholding taxes on exercise of restricted stock units	(5)	(55)
Purchases of treasury stock	(9,977)	(27,621)
Net cash used in financing activities	(9,982)	(27,676)
Net increase (decrease) in cash and cash equivalents	5,619	(24,578)
Cash and cash equivalents, beginning of year	12,550	37,128
Cash and cash equivalents, beginning of year	18,169	12,550
Cash paid (received) during the year for:
Payment (refund) of federal and state income taxes	(275)	53
Non-cash investing and financing activities:
Issuance of common stock for vested restricted stock units	6	263
Distribution of debt and equity securities in satisfaction of deferred compensation liability (including 1,375 shares of treasury stock in 2018)	$ 0	$ 1,866