Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 53,249	$ 55,313
Accounts receivable (net of allowance of $814 and $581 at September 30, 2019 and December 31, 2018, respectively)	16,895	22,057
Inventories	2,614	3,912
Prepaids and other current assets	5,470	5,023
Assets held for sale		1,089
Total current assets	78,228	87,394
Property, plant and equipment, at cost	381,662	422,966
Less accumulated depreciation	(362,425)	(396,705)
Property, plant and equipment, net	19,237	26,261
Operating lease right-of-use assets	22,119
Intangible assets, net	458	304
Deferred income taxes, net		3,572
Long-term note receivable	22,400
Other assets	3,178	5,029
Total assets	145,620	122,560
Current liabilities:
Accounts payable	5,868	6,334
Accrued compensation and benefits	7,933	8,294
Other accrued expense	6,836	5,586
Advance subscription payments	11,349	11,449
Total current liabilities	31,986	31,663
Long-term pension liabilities	29,213	31,889
Long-term operating lease liabilities	23,598
Other post-employment benefits	1,153	1,165
Deferred income taxes, net	246
Other liabilities	3,917	7,045
Total liabilities	90,113	71,762
Shareholders' equity:
Preferred stock, $.01 par value; Authorized 2,000,000 shares; none issued
Treasury stock, Series A, at cost; 1,880,828 and 1,697,370 shares held at September 30, 2019 and December 31, 2018, respectively	(13,320)	(12,601)
Additional paid-in capital	494,389	494,389
Accumulated other comprehensive loss	(37,453)	(37,641)
Accumulated deficit	(388,342)	(393,582)
Total shareholders’ equity	55,507	50,798
Total liabilities and shareholders’ equity	145,620	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