CAPITAL STOCK - Additional Information, Preferred Stock Purchase Rights (Detail) - 12 months ended Dec. 31, 2016 - Series A Preferred Stock	$ / shares	SEK / shares
Class of Stock [Line Items]
Preferred stock purchase right, purchase rights granted per share of common stock | SEK / shares		SEK 1
Preferred stock purchase right, exercise price (USD per right) | $ / shares	$ 220
Preferred stock purchase right, expiration date	Mar. 10, 2016