Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 52,017	$ 55,313
Accounts receivable (net of allowance of $834 and $581 at June 30, 2019 and December 31, 2018, respectively)	20,468	22,057
Inventories	3,454	3,912
Prepaids and other current assets	5,808	5,023
Assets held for sale		1,089
Total current assets	81,747	87,394
Property, plant and equipment, at cost	423,389	422,966
Less accumulated depreciation	(401,393)	(396,705)
Property, plant and equipment, net	21,996	26,261
Operating lease right-of-use assets	22,222
Intangible assets, net	598	304
Goodwill	1,593
Deferred income taxes, net		3,572
Long-term note receivable	22,400
Other assets	3,675	5,029
Total assets	154,231	122,560
Current liabilities:
Accounts payable	6,062	6,334
Accrued compensation and benefits	7,484	8,294
Other accrued expense	5,101	5,586
Advance subscription payments	12,844	11,449
Total current liabilities	31,491	31,663
Long-term pension liabilities	30,105	31,889
Long-term operating lease liabilities	23,631
Other post-employment benefits	1,158	1,165
Deferred income taxes, net	1,718
Other liabilities	4,775	7,045
Total liabilities	92,878	71,762
Shareholders' equity:
Preferred stock, $.01 par value; Authorized 2,000,000 shares; none issued
Treasury stock, Series A, at cost; 1,828,983 and 1,697,370 shares held at June 30, 2019 and December 31, 2018, respectively	(13,128)	(12,601)
Additional paid-in capital	494,389	494,389
Accumulated other comprehensive loss	(37,516)	(37,641)
Accumulated deficit	(382,625)	(393,582)
Total shareholders’ equity	61,353	50,798
Total liabilities and shareholders’ equity	154,231	122,560
Series A
Shareholders' equity:
Common stock, $.01 par value; Authorized 125,000,000 shares	209	209
Series B
Shareholders' equity:
Common stock, $.01 par value; Authorized 125,000,000 shares	$ 24	$ 24