Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 746,561	$ 745,491
Short-term investments	172,822	179,204
Accounts receivable, less allowances of $0 and $537	28,282	28,272
Prepaid and other current assets	84,292	63,365
Total current assets	1,031,957	1,016,332
PROPERTY AND EQUIPMENT, NET	16,244	10,217
PATENTS, NET	437,546	436,339
DEFERRED TAX ASSETS	78,664	73,168
OTHER NON-CURRENT ASSETS, NET	76,083	76,026
Total non-current assets	608,537	595,750
TOTAL ASSETS	1,640,494	1,612,082
CURRENT LIABILITIES:
Current portion of long-term debt	0	94,170
Accounts payable	12,137	13,393
Accrued compensation and related expenses	27,043	29,162
Deferred revenue	248,086	146,654
Taxes payable	121	51
Dividends payable	10,782	10,746
Other accrued expenses	19,243	11,382
Total current liabilities	317,412	305,558
LONG-TERM DEBT	363,523	350,588
LONG-TERM DEFERRED REVENUE	108,587	123,653
OTHER LONG-TERM LIABILITIES	48,296	46,002
TOTAL LIABILITIES	837,818	825,801
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Preferred Stock, $0.10 par value, 14,399 shares authorized, 0 shares issued and outstanding	0	0
Common Stock, $0.01 par value, 100,000 shares authorized, 71,379 and 71,268 shares issued and 30,806 and 30,701 shares outstanding	713	712
Additional paid-in capital	735,922	727,402
Retained earnings	1,426,239	1,412,779
Accumulated other comprehensive income (loss)	8	(74)
TOTAL SHAREHOLDERS’ EQUITY	2,162,882	2,140,819
Treasury stock, 40,573 and 40,567 shares of common held at cost	1,379,611	1,379,262
Total InterDigital, Inc. shareholders’ equity	783,271	761,557
Noncontrolling interest	19,405	24,724
Total equity	802,676	786,281
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,640,494	$ 1,612,082